- Complete name: Justin Peter Lowenbrau Griffin Sr.Debut: "Death Has a Shadow"
A portly father from Rhode Island who's an immature, dim-witted, outspoken, eccentric alcoholic. Used to work at a toy factory before the owner of the plant died, then worked as a fisherman for a couple of seasons, and now works a desk job at a brewery.
- Abusive Dad: Up to Eleven and beyond in later seasons. He wasn't always like this in early seasons, although now he's a lot worse than the Jerkass version of Homer Simpson. In "Peter's Sister" it's revealed that he is like this due to the fact that his sister Karen always bullied and abused him.
- Acrofatic: He can really move for someone that's considered to be technically obese.
- Acquired Situational Narcissism: Happens to him a lot. For example, he becomes increasingly narcissistic after getting extensive plastic surgery to make himself fit and beautiful. It ends when he gets in an accident and goes back to normal.
- Action Dad: Sometimes. His battles with Ernie The Chicken certainly prove this as he's able to put up fights that go through the whole town and last about five minutes.
- Adorkable: He could be seen as this in the earlier seasons, surprisingly enough, as he was absurdly kooky and childish but had his heart in the right place.
- Aesop Amnesia: In "Peter's Daughter", after Meg endured an accident in which she nearly dies, Peter decides that he should become a better father and never treat her badly ever again. It goes well during the course of the episode, to the point he becomes the Overprotective Dad. Despite this, he goes back to abusing her by the next episode.
- The Alcoholic: He's actually less of a drunk than Homer is, although that isn't saying much as he still establishes himself as an outright nuisance when intoxicated both at home and in public.[Peter drunk at a library]
Peter: [slurred] Aw, don't be ashamed of your hand, Johnny Tremain, you still live in exciting times!
[a police officer walks up to him]
Peter: Ah, crap.
Officer: Sir, do you know how loud you were reading?
[Peter starts running with the officer chasing him]
Peter: [reading rapidly] "The life of a silversmith's apprentice was not an easy one—" [slips and crashes into a bookcase]
- Alcohol-Induced Idiocy: While he's plenty stupid on his own (to say the least), several of his antics are fueled by inebriation.
- Alcoholic Parent: He got that from his biological Irish father. It's a great honor in Ireland to be the town drunk.
- All Women Are Prudes: A believer of this trope. Lucky for him, he's married to an aversion (who even agrees with him about the trope), and quite ironically, the show depicts women (namely Lois) in the opposite.Peter: You know what really grinds my gears? This Lindsay Lohan. Lindsay Lohan with all those little outfits, jumping around there on stage, half-naked with your little outfits. Ya know? You're a... you're out there jumping around and I'm just sitting here with my beer. So, what am I supposed to do? What you want? You know, are we gonna go out? Is that what you're trying to - why why are you leaping around there, throwing those things all up in my, over there in my face? What do you want, Lindsay? Tell me what you want. Well, I'll tell you what you want, you want nothing. You want nothing. All right? Because we all know that no woman anywhere wants to have sex with anyone, and to titillate us with any thoughts otherwise is - is just bogus.
- Amazingly Embarrassing Parents: Before evolving into a deliberately abusive one.
- Animal Motifs: Pigs, for fairly obvious reasons. There was even one cutaway gag where Peter was one of The Three Little Pigs!
- Annoying Laugh: His nasal "Heheheheheheheh!" is a memorable part of his character.
- Anti-Role Model: Pretty much ever since day one, where the family's debut episode is memorable for him being passed out on the kitchen table after a night of drinking at a stag party.
- Attention Deficit... Ooh, Shiny!: Chris even lampshaded one episode after Peter's stint as a pirate in which he quickly loses interest after losing his parrot and found a piano. Most of Peter's antics is due to his "It Amused Me" attitude. If something is not amusing him, he will quickly find something else that will, which makes his focus waver all over. Peter also has a nasty habit going completely off topic when he speaks to someone without missing a beat at all. Brian lampshades this when he asks Peter if he is asking for his help or if he is going to ask another pointless question again.
- Attention Whore: Particularly in early seasons.Peter: Hey look! I fell in the pool with my clothes on! How hilarious is that? That is so Peter Griffin! Guys? Guys?
- Author Avatar: Has shades of this for Seth MacFarlane, mostly revolving around his taste in pop culture.
- Ax-Crazy: At his worst. Terrorizing elementary school students in a cougar costume and going on a homicidal rampage at a bank in front of Meg, among other things.
- Bank Robbery: Commits one in "Meg Stinks".
- Beware the Silly Ones: Childish, goofy, but can be really dangerous if provoked.
- Big Fun: In the early seasons anyway, where he was a Kindhearted Simpleton who cared about his family deep down and tried to do the right thing.
- Bi the Way: Has been implied throughout the entire series. Bordering on Depraved Bisexual.
- Finally came out as bisexual in Season 16's Veteran Guy.
- Big Beautiful Man: In the episode "He's Too Sexy For His Fat."
- The Bully: Aside from abusing Meg, he acts like one in 'The Tan Aquatic with Steve Zissou' when he beats up another bully named Kyle and is convinced to be like one.
- Bullying a Dragon: In "How The Griffins Stole Christmas," he thinks it's okay to keep pissing off the real Santa after the latter's warnings. He pays hard for this.
- Bully Hunter: He sometimes defends Meg and Chris by dishing No Holds Barred Beatdowns to their bullies, which is hypocritical since he bullies Meg most of the time.
- Bumbling Dad: In the earlier seasons, Peter did seem to try to do the best for his kids, even if he fails miserably.
- Butt-Monkey: And how. He's often being the subject of slapstick, especially in the cutaway gags.
- Can't Take Criticism: Doesn't take being called out by Meg well at all in "Seahorse Seashell Party". "Roasted Guy" has him finding new friends because his feelings were hurt at a roast in his honor. He thought they were going to tell amusing stories instead of, you know, roasting the guy.
- Cerebus Retcon: Abiding by "Peter's Sister", Peter's bullying on Meg was due to venting out years of bullying from his sister, Karen.
- Characterization Marches On:
- Pre uncancellation, Peter was still an Unsympathetic Comedy Protagonist, but little past an exaggerated Bumbling Dad, and usually more Innocently Insensitive than outright callous. Most of the early episodes revolved around dilemmas exacerbated by his well intentioned attempts to care for his family.
- In the early seasons, Peter had a very low opinion of women, treating them like objects at worse (such as referring to Lois as "it" in "Running Mates"). From the uncancellation onwards, Peter tends to treat women better.
- The Chew Toy: Most of the abuse and slapstick he endures balances out his karma houdinis.
- Cloudcuckoolander: He's the most observant of the wackiness of the universe around them, (and sometimes the most knowledgeable about it), and is the most frequent supplier of it too.
- Conflicting Loyalty: While working for a cigarette company when they planned to advertise their product to children. This also applies to Quagmire and Brian since both Characters had feelings for his wife Lois, he even mentions that he hates Brian for flirting with her, despite their friendship.
- Dirty Coward: Though he can also be a Lovable Coward on his better days.
- Disproportionate Retribution: Occasionally. His feud with Ernie The Chicken in particular comes to mind, as it all began with an expired coupon. And then a restaurant bill when it seemed like they had settled their differences.
- The Ditz: Peter really ain't smart at all.
- Disability as an Excuse for Jerkassery: Uses his intellectual disability label to get away with a lot of jerkassery. Except when the excuse bites him in the ass.
- Drunken Master: He turns out to be skilled at the piano in drunk mode.
- Dumbass Has a Point: Occasionally.Peter: You better watch who you're calling a child, Lois, because if I'm a child, then you know what that makes you? A pedophile, and I'll be damned if I'm gonna stand here and be lectured by a pervert.
Peter: Well who the hell are you to tell me how to run my marriage? You can't even hang on to a girlfriend for more than a couple of months.
- Also in "Play It Again, Brian" during his argument with Brian after the latter tried to hit on Lois.
Brian: What the hell is that supposed to mean?
Peter: Oh, y-you're a freakin' train wreck with that crap, Brian! You couldn't even get Jillian to take you back, and she was dumber than Lou Ferrigno.
Peter: Nobody believed we'd make it and look at us now. I drink and you use sex as a weapon. That seems to me like a successful New England marriage.
- Done spectacularly in "Quagmire and Meg" where Lois chastises Peter for interfering with Meg's supposedly harmless fling with Quagmire. When she finds out Quagmire intends to have sex with Meg and blames Peter for letting it happen, Peter instantly calls out her hypocrisy, leading her to begrudgingly admit she was wrong for a change.
- In "Brothers and Sisters," Lois tries to break up a romance between her sister Carol and Mayor West, believing the relationship will end badly like Carol's previous marriages. When West finally gives up and plans to leave Quahog, Peter calls her out on her bullheadedness by reminding her of the time Carol stuck up for them when others thought their relationship would fail.
- Embarrassing First Name: Subverted in "Quagmire's Mom"; after finding out his given name is actually Justin, he decides it to be an Awesome Mc Coolname, and proceeds to milk it for all it's worth.
- Entitled Bastard: A cutaway in "Quagmire's Mom" showed him trying to abandon Meg in a field, then begging her to save him and nurse him back to health after he crashed his car into a tree.
- The Everyman: How Peter regards himself, and how his character is supposed to be regarded by the viewer.
- Everyone Has Standards: There are some things even he, a lazy, obese, irresponsible, alcoholic idiot, just won't agree with.
- Example in The Cleveland Show season finale, where Quagmire still wants his own spin-off.Quagmire: Well, they made it through the whole season. Now can I have my own show, Peter?
Peter: Quagmire, you're a rapist.
- He's legitimately disturbed at the implications of Meg and Chris bathing together in "Fresh Heir".
- Even Peter thinks that Lucy pulling the football away from Charlie Brown is messed up.
- In the Family Guy/The Simpsons crossover episode, Peter seems legitimately (and rather hypocritically, coming from him) disturbed when Homer casually tells him that he strangles Bart everyday.Homer: No it doesn't! I do it to my son all the time!
Peter: You strangle your son?! That's insane! No wonder your son is fat, and stupid, and masturbates all the time!
Homer: That's your son!
- He usually doesn't have a problem with Quagmire trying to get women into sleeping with him, and he's pretty negligent when it comes to Meg. However, he draws the line when his best friend tries to seduce his daughter.
- Example in The Cleveland Show season finale, where Quagmire still wants his own spin-off.
- Extreme Omnisexual: He is attracted to women, has had sexual relationships with men (Bill Clinton for example), is Ambiguously Bi and in one instance was shown to have intentions of wanting to have sex with a tiny female rat and also was in an abusive sexual relationship with a male bull who had raped him. There are even unfortunate implications that he's sexually attracted to minors (has a crush on Connie D'Amico and once told Lois that he shouldn't nag him about being a kids' show host as he "...can have any 3-year-old [he] wants.") "Fresh Heir" also implies he'll go as far as incest and ephebophillia, as it's heavily implied he wanted to do more than just marry Chris for his father-in-laws inheritance. He also had sex with the Surfing Bird record.
- Fat Bastard: He makes Homer Simpson look like a real saint...while also making Satan's existence redundant. He's even depicted as one of the Three Little Pigs in one Cutaway Gag!
- Fat Best Friend: To Joe, Quagmire, Cleveland and Brian.
- Fat Idiot: Fatter than Homer Simpson and a complete moron. He provides the trope page image.
- Fat Slob: He always says something inappropriate at the wrong times and will always try to fart anywhere and at anyone. He will also get drunk at any chance he can get.
- Flanderization: He used to just be a moron who tried to do what's best for his family in spite of his shortcomings but is now just the Jerkass that's actually medically labeled as a mentally disabled person.
- Freudian Excuse:
- Peter has been legally classified as an intellectually disabled person.
- "Peter's Sister" reveals he bullies Meg to deal with his sister Karen bullying him as a kid.
- The Friend Nobody Likes: Surely with each passing season.Quagmire: Screw this! You're a jerk!
Peter: A jerk? What kind of a way is that to talk to your friend who gives you money?
Quagmire: Go to hell, Peter! We don't need your money! And we don't need friends like you!
Joe: Yeah, we're outta here!
- Gasshole: He likes to fart a lot.
- Genius Ditz: Peter knows a lot about pop culture, KISS in particular. He's also a skilled musician, able to sing and play trombone, and when he's drunk, he's a piano virtuoso with (apparently) no prior training. He also managed to use the ''cutaway gag'' to his advantage in "Finders Keepers"!
- George Jetson Job Security: She's apparently given this to Peter. No matter how much trouble he gets into, he's never gotten the punishment of losing his job. Exemplified best in "Tales of a Third Grade Nothing", when Peter burned down a children's hospital on the job. This was forgotten about, until the very end of the episode, when Angela brought it up again, and said that she called the cops. Peter was arrested, but the judge only sentenced him to a week in jail.
- He-Man Woman Hater: Peter is often presented as the classic misogynist, thinking he's superior in every way and that Lois and other women are unworthy of anything other than satisfying his whims and desires, and woe be it on them if they object. He frequently thinks nothing of women other than sex objects and gets into a huge argument when others point this out.
- The Hedonist: The most extreme examples are usually reserved for cutaways, but he tends to spend money on whatever will entertain him (later episodes have implied that the family's finances are shaky). He's criticized by Meg for this in "Seahorse Seahorse Party".Meg: You have no education, you have no interests, you just do whatever reckless thing you wanna do, whenever you wanna do it, without regard for anyone else! And, oh, when you're not terrorizing the community with your impulsive escapades, you're being a total jerk to your family! You shove your daughter's face in your ass and you fart on it!
- Heroes Want Redheads: Although he's faaaaaaar from being a hero, he's the main character and married to the redheaded Lois.
- Hilariously Abusive Childhood: His (step)father was a hard-nosed fundamentalist who constantly ragged on him and, apparently, told him he wasn't his father repeatedly. And there was one flashback where his mother threw a bottle of whiskey at him to shut him up. He has a sister named Karen, who basically treated him like the way he treats Meg but worse and his parents didn't do anything to stop it. They are basically the reason why Peter is the man he is today.
- Hypocrite: In "Stewie Loves Lois", he sued Dr. Hartman because he thought he molested him, this was after he attempted to grope his wife (he ended up touching Stewie instead).
- Hypocritical Heartwarming: He puts Meg through hell on a daily basis, but he will brutalize anyone outside the family who does it to her.
- Hypocritical Humor:
- He insults women for being fat and ugly, but he isn't that good looking himself.Peter: Men aren't fat. Only fat women are fat.
- In the Simpsons Guy crossover he finds it insane that Homer strangles his son. While he's right, this would have been a Everyone Has Standards moment if not for the fact that Peter has done far worse abuse (both emotional and physical) to his kids, like hitting Meg in the head with a baseball bat, whipping her and Stewie, or even shooting his daughter with a Desert Eagle in one episode. And it's worth noting that, while child abuse is never justified in any case, Homer strangles Bart because of his bad temper when Bart makes him mad unlike Peter who tortures Meg for his own amusement.
- He insults women for being fat and ugly, but he isn't that good looking himself.
- Idiot Houdini: In-canon, he was sent to prison for one week for accidentally blowing up a children's hospital. That and many examples can be owed more to his stupidity than his callousness. Meg lampshades that most of the things he's done should have landed him in jail by now.
- Innocently Insensitive: Some of his more thoughtless actions in earlier seasons count as this. Less so in later seasons, where he is more just an apathetic Jerkass that hides behind his "I'm retarded" excuse when it suits him.
- It Amused Me: The main reason for his shenanigans.
- It's All About Me: He does whatever he wants, whenever he wants with no regard to anyone but himself, and gets mad when made to put others first, especially in later seasons. He has his selfish moments early on too, but is much more well-intentioned the majority of the time.
- I Am Not Shazam: Invoked. Peter often calls characters in movies or films by the title of the movie or film in question, such as Scrubs, Black Scrubs, Jaws, and Bigger Jaws.
- Insufferable Imbecile: He's narcissistic, slovenly, lazy, and imbecilic, all of which Meg laid into him for in her rant near the end of "Seahorse Seashell Party". Peter, of course, completely misses the point and takes offense to her calling him "a waste of a man".
- Iron Butt Monkey: He always comes back from his numerous (sometimes fatal) injuries.
- I Was Beaten by a Girl:
- He was upset when Stewie was beaten up by Suzie Swanson, so he put Stewie on steroids.
- He himself got brutally beaten by Meg after she finally snapped, and usually gets his ass handed to him whenever he and Lois have physical clashes.
- Jaded Washout: Barely does anything with his life.
- Jerkass: Occasionally in earlier seasons, more frequently after season three. He starts out as a Jerk with a Heart of Gold but after the show comes back he transforms into an abusive jerk who openly hates Meg for no reason, both physically and verbally abusing her. He even puts his other family members in danger without caring what would happen to them.
- Jerkass Has a Point: When Peter discovers Quagmire's secret lust for Lois, he is understandably paranoid since Quagmire is a sex offender at his worst and a serial womanizer, not only that but he ruined Cleveland's first marriage. When Brian tells Peter that he doesn't deserve Lois, Peter has some justification in being angry since Brian also forced himself on Lois and in later seasons, would have affairs with married women.
- Jerk with a Heart of Gold: In earlier seasons.note While Peter was a bit selfish and insensitive at first, he was still a decent guy who only wanted the best for his family.
- Karma Houdini: Peter has gotten away with assault, murder, robbery, arson, fraud, child molestation, kidnapping, spousal abuse — in short, pretty much every felony on the book. He's a jerk at work and to his family and friends. His mind is constantly occupied with lewd thoughts and freely uses foul language (some of which has to be altered or bleeped out on television). The man should be either dead or, as Meg once said, in jail. Yet, he walks free, he proclaims himself as "everyman," and he still has everything he holds dear: he's a homeowner, he has a good job, he has a family and good friends. For a lot of fans, this irritates them, despite that, Family Guy is supposed to be an exaggerated take on family sitcoms and chooses not to follow reality until the plot calls for it.
- Kindhearted Simpleton: In earlier seasons. His negative actions mostly came from his stupidity, and he was well-meaning and a fairly nice guy to begin with (at worst, he was a bit self-centered and irresponsible).
- Lack of Empathy: Up to Eleven from season four and onwards. Although, on some occasions, he has been known to show concern and/or outrage towards heinous acts.
- Large Ham: Very frequently post-cancellation. He's prone to insane, sometimes random fits of quirkiness.
- The Leader: To his Four-Man Band of Cleveland, Joe, Quagmire, and himself.
- Lethally Stupid: In the later seasons. His stupidity has reached a point to where he's extremely dangerous to those around him, and possibly sociopathic.Peter: [screaming and being held down in a straight jacket after Brian switches his "I Can't Believe Its Not Butter" with actual butter]
Lois: I don't know, Doctor. Looking back, I think it may have been real butter.
Doctor: Your husband murdered three children.
- Like a God to Me: What he thinks of KISS.
- Made of Iron: On top of surviving various over-the-top injuries that are usually his own fault, during their fights, Peter and Ernie the Giant Chicken suffer horrific injuries that should by all rights kill them, but Peter is never more than just breathless after the battle ends.
- Manchild: He's about 43 years old, but he acts like an eight-year old.
- Meaningful Name:
- Fitting a beer-swilling brewery employee, Lowenbrau is a German brewery in Munich. It means "lion's brew."
- It also sounds like 'Low Brow', which means to have low intellect or interest in culture. Which describes Peter's tastes perfectly as he hates Citizen Kane for it's lack of raunchy material but loves Paulie Shore movies like Bio-Dome.
- Medium Awareness: Peter seems to be the only character on the show who realizes he's actually a character on a show. On at least one occasion, he comments on the length of an episode, and he uses cutaway gags to get from one place to another instantly:Peter: [standing outside The Drunken Clam] Oh no, they're closed. Hang on, I got an idea... but you have to believe.
Peter: This is worse than the time we were in The Clam right now. [he and Lois are instantly transported into The Clam] Yes!
- The Millstone: Due to his extreme carelessness:Lois: You're unbelievable! The last four days have been a living hell! Our baby is at home all by himself yet instead of getting us home you've managed to make things worse at every turn! A monkey would be a refreshing step up from you! A monkey would talk less! Here's a little tip. If your instinct tells you to do something, don't do it! If your instinct tells you not to do something, IT'S PROBABLY THE RIGHT THING TO DO!!!
- Moral Myopia: After his attempt to abandon Meg in "Quagmire's Mom" went wrong, resulting in Peter being very badly injured, he wailed "Why do bad things happen to good people?!".
- Motor Mouth: When he's a dog at least, in the episode "The Road to the Multiverse".Dog Peter: OH-MY-GOD-I-KNOW-THAT-SOUND-IT-MEANS-THERE'S-A-POTENTIAL-INTRUDER-AT-THE-FRONT-DOOR-OR-ONE-OF-MY-PALS-EITHER-WAY-I'M-EXCITED-AND-READY-FOR-ANYTHING!
- Offscreen Villain Dark Matter: Multiple characters have commented on the expenses Peter incurs in his shenanigans, and wonder how he can possibly afford them.
- "Meg Stinks!" implies that Peter actually robs banks in order to pay for those very expenses.
- Overly Long Name: His full name is Justin Peter Lowenbrau Griffin Sr.
- Pædo Hunt: Quite possibly, he's the only lead protagonist-type character in prime time history to have strong sexual feelings toward children, as evidenced by episodes such as "You Can't Do That On Television, Peter" and "Brian's a Bad Father."
- Papa Wolf:
- He gets really hostile towards Quagmire when he tries to have sex with Meg once she turns 18. This is especially jarring when he's usually ignoring or flat-out abusing her. With a few exceptions.
- He does beat up Jimmy Fallon for sleeping with Meg. Or at least for laughing at his own jokes.
- He becomes straight up Over Protective Dad in "Peter's Daughter" in which he brings a rifle with him when he's going to talk with Michael, Meg's ex-boyfriend, because he made her pregnant.
- The Pig Pen: Downplayed. Peter isn't visibly filthy, but many gags revolve around the fact that his hygiene is poor. Perhaps most notably, in the Season 14 episode "Underage Peter", Quagmire offers him $10 to wear the same pair of underwear for a month:Peter: [immediately after the offer was made] Pay up. [Quagmire gives him $10] Actually, you owe me 20.
Quagmire: Ew. Here's 50. Go change your underwear.
Peter: [shaken] It won't come off!
- Psychopathic Manchild: Peter's antics are responsible for dozens of serious injuries, millions of dollars in property damage, and a death toll well into the double digits.
- Raised Catholic: because of Francis' influence, Peter has been known to get anxious when things come into conflict with his Catholic upbringing. Also, Francis calls Peter out when he founds a religion influenced by both Roman Catholicism and his admiration for Fonzie from Happy Days.
- "The Reason You Suck" Speech: Gives one to Lois after being called The Millstone. It's enough to make Lois feel bad much later. And it's from Planes, Trains and Automobiles.Peter: You wanna hurt me? Go right ahead if it makes you feel any better. I'm an easy target. Yeah, you're right. I talk too much. I also listen too much. Oh, I can be a cold-hearted cynic like you, but I don't like to hurt people's feelings. But you think what you want about me. I'm not changing. I like- I like me. My kids like me. My friends like me, 'cause I'm the real article. What you see is what you get.
- Running Gag: His love of The Trashmen's "Surfin' Bird," for one. He also has an enjoyment of The Facts of Life, as subtly shown throughout the series.
- Sitcom Arch-Nemesis: Frequently gets into epically destructive fights with Ernie the Giant Chicken.
- Small Name, Big Ego: One of his many defining traits.Lois: Aagh, I hate what you've become! Why don't you go back to that doctor and have him suck the fat out of your head?!
Peter: Maybe I will. Then I'll put it on my feet and skate around Paul Bunyan's giant skillet to cook his flapjacks!
Lois: That doesn't make any sense!
Peter: It doesn't have to. I'M BEAUTIFUL!
- The Sociopath: He can go from a comedic jerkass to a sociopath with his abuse of Meg in particular.
- Straw Loser: The entire universe consists of a bunch of brainless sociopaths, but nothing on this Psychopathic Manchild with a dead end job who thinks hitting his daughter is funny. The largest reason Brian and Lois can still seem closer-to-Earth these days and his Memetic Molester and mentally depressed handicapable buddies can end up as Straight Men. Lampshaded in "The Most Interesting Man In The World". When Peter starts to act intelligent and sophisticated, the others start to feel insecure from them now being the idiots of the bunch.
- Teeny Weenie: Peter is said to have a small penis. In "Trans-Fat" Peter's size original size was 2 inches, as his new penis is now 4 inches "2 inches past his goal".
- Temporarily a Villain: Especially in later seasons.
- Temporary Bulk Change:
- In "Fish Out Of Water", Peter gains so much weight after he loses his job that he becomes an immobile blob who has to be moved around by a crane. But when he starts looking for a job, he somehow gets his body shape back to normal.
- In "Da Boom", he eats an entire year's supply of dehydrated food, and looks no different. Then he complains that he's still hungry and drinks a glass of water, and immediately balloons out to fill half the room.
- He also gets liposuction twice to be thin and (later) muscular. But after being an ass about it, he crashes his car and falls into a lard vat in a lard factory, eating it to get out. He's taken to the hospital, where he's back to being fat.
- This Loser Is You: In the same vein as Homer Simpson, albeit dumber, fatter, and less sympathetic.
- This has been extended in special episodes. If Peter joins an opposing side to Brian, then Peter will represent everything that's wrong with that movement.
- Too Dumb to Live: On which Petarded hangs a lantern.
- Took a Level in Dumbass: He is much stupider than he was in the early seasons.
- Took a Level in Jerkass: He always was somewhat selfish and dumb. However, in the first few seasons, he seemed to do insane actions to, at least in his own mind, better the lives of his family and was still a well-meaning and was a mostly friendly and easygoing guy. By season six, he was turned into a full-time jerk who is even implied to be a psychotic killer according to the cutaways.
- Took a Level in Kindness: Around the 14th season, his abuse towards Meg and the family as a whole has been phased out.
- Tranquil Fury: "I just want to talk to him.
- Ugly Guy, Hot Wife: Ugly Guy to Lois' Hot Wife with a little Lampshade Hanging, as the couple was once described in an in-universe news report as "a fat man inexplicably married to an attractive redhead", along with an artist's impression of what they might look like - Fred and Wilma Flintstone.
- The Unapologetic: You'll be very hard pressed to make Peter feel bad for his antics.
- Unconfessed Unemployment: In the pilot.
- The Unfavorite: Peter is this, to her, when she compares him to his co-worker, Opie.
- Ungrateful Bastard: In "You Can't Do That On Television Peter," Meg saves his life and he never even thanks her for it.
- Unscrupulous Hero: He's wandered into this territory as the show's gone on.
- Unsympathetic Comedy Protagonist: He constantly undermines his wife (who, herself, isn't too fine and dandy of a character either), scolds Chris when he finds out he has a larger penis than him, constantly bullies and mistreats his own daughter, and has apparently put all of his kids in a coma while hiding it from his wife and not taking them to a hospital.
- Vitriolic Best Buds: With most of his friends and neighbors, particularly Brian.
- Voluntary Shapeshifting: During the events of Super Griffins.
- "Well Done, Son!" Guy: During the early seasons, Peter is shown wanting respect from his father Francis. He even hires a band to play sappy Sitcom music for his moment. Francis eventually admits that he does love Peter, he just doesn't like him. This trope is played straight when he gains the approval of his biological father.
- We Want Our Jerk Back: Whenever Peter attempts to change and starts acting more polite or intellectual, Lois soon wants him back to normal. In at least one case it's heavily implied to be because Peter being a dumb jackass makes her feel intellectual by comparison.
- With Friends Like These...: His relationship with pretty much everyone, including his best friends.
- Would Hit a Girl: Just ask Meg.
- Would Hurt a Child: One particular incident involves him giving Lucy Van Pelt a well-deserved comeuppance after making Charlie Brown slip backward while trying to kick the football one too many times.