Berserk Button: He finds it very emasculating whenever someone he's hanging out with gets asked out on a date right in front of him. Even if it's a gay man getting asked out by another gay man.
Jerry: How do you know we're not together?!
Born Lucky: Jerry was at his funniest when everything goes right for him, which is often. Much of an episode is dedicated to reiterating the fact that everything consistently turns out all right for him, and nobody else. And then he gets thrown into prison with the gang for a year. But before then, he's pretty darn lucky.
Elaine:(exasperated) You know, one of these days, something terrible is going to happen to you! IT HAS TO!
Jerry:(nonchalant) No, I'll be just fine.
The Casanova: Had relationships with around 75 women over the course of the series.
Manipulative Bastard: The real life Jerry has stated that if the character Jerry sees his friends about to do something that will backfire, he will often push them towards doing it in order to watch the results for his own amusement.
Neat Freak: Taken to near-pathological levels when his girlfriend put something of his in the toilet and wouldn't tell him what it was. It was the toilet brush. When he finds out, he's relieved... because he can easily replace it.
Nice Jewish Boy: Subverted. Jerry's mother can't be persuaded that her son isn't a nice Jewish boy, although he very obviously is not.
No Good Deed Goes Unpunished: He tries to help Babu save his restaurant and avoid getting deported. Both fail due to outside circumstances and Babu later testifies against him, sealing his fate at the trial. They were probably the only genuinely good and unselfish things Jerry ever tried to do.
One-Hour Work Week: Outside of the openings, he's rarely seen performing standup (which is supposed to be his livelihood) and even more rarely seen writing new material, something which is often lampshaded by other characters. Despite this he's very successful at it, makes the most money of the group, and regularly appears on shows like Leno and Letterman.
Status Quo Is God: Seems to have this as a superpower, causing Kramer to call him "Even Steven". Everything tends to even out for him and leave him no better or worse than when he started. To test this, Elaine takes 20 bucks from him and tosses it out the window to test his theory, and sure enough when Jerry puts on his jacket to leave he puts his hand in the pocket and finds 20 bucks. This also explains how he's dated so many women. Whenever he has a break-up he'll always find a new woman very soon.
Brilliant, but Lazy: George comes up with surprisingly brilliant schemes, but for the purposes of completely pointless things. One can only wonder how successful he'd be if he put the effort into work that he puts into avoiding work.
In "The Abstinence", it's shown that if he stops obsessing about sex and uses his brain for other things, he becomes a genius (although that episode shows that this applies to all men, not just George).
Referenced in one of the few pieces of Jerry's standup that had to do with the plot: "I've got a friend on welfare right now, and if they had any idea of the time and effort that he has put into keeping this thing going, I'm sure they'd give him a raise. He's down at the office every day, making all kinds of excuses. He's doing an incredible job not working."
To be fair, his leg was injured when he took the job, and he was even about to tell his new boss that he wasn't really disabled. Then his boss had to go and mention the private bathroom he would be getting...
Freudian Excuse: It's implied that his childhood is what caused his very warped view on the world and humanity. In his eyes, everyone else is a selfish jerk, so to get ahead, he needs to be the biggest and most selfish jerk of them all.
Hollywood Dateless: Is bald, overweight, often unemployed, and his personality flaws are too long to list. The show draws heavy attention to what a loser he is, yet he had sex with 43 (very attractive) women over the course of the show.
It's All About Me: Upon hearing about Susan's death, his reaction is to get a cup of coffee with his friends.
Laser-Guided Karma: After indirectly killing Susan and acting elated after her death, he is put on the board for the Susan Ross Foundation, taking away much of his free time and leaving him with the constant reminder of how wealthy he would have been had she not died. This may have even been the entire point of the Foundation, since Susan's parents never liked George very much, and also suspected (along with everyone else on the board) that he murdered Susan deliberately.
After faking involuntary muscle spasms in his arm in front of Lloyd Braun, Lloyd gets him a doctor's appointment, which George has to go to in order to keep up the act. The doctor examines George, deduces that he's faking, and angrily tells him to get out. As George leaves, he bangs his arm, which causes him to have real spasms exactly like he was faking before.
Pet the Dog: His genuine guilt over and desire to help a busboy that he accidentally got fired. It's one of the only times in the series where he shows any sign of empathy.
Real Men Wear Velvet: Or at least they would, if it was socially acceptable. He finally manages to live out his fantasy of dressing in all velvet when dating a girl who doesn't care about physical appearance. Unfortunately for him, he gets Squicked when she starts to suck on a peach pit from a peach he ate, and breaks up with her.
Throw the Dog a Bone: Sure he probably deserves the bad things that happen to him more than the other three but that said, he does get a pretty big win in the last episode of season 5 when doing everything the opposite of what his instinct tells him gets him a new high profile job (with the New York Yankees!), a beautiful girlfriend and finally gets to move back out of his parents house. Pretty much the only episode to have a happy ending for George.
Too Dumb to Live: Self-proclaimed 'Lord of the Idiots'. He's really not exaggerating. In general, it seems to be more an issue of really bad decision making, and not a question of intelligence. When he wants to be, he's brilliant.
Bunny-Ears Lawyer: Two different jobs despite her pettiness and insanity and held them for years. Pendant Publishing was the publishing company she worked at in the early years, under Mr. Lippman. J. Peterman was when she wrote for the Peterman Catalogue. In both it's suggested she's pretty good at her job
One of the Boys: Possibly Trope Codifier as it was groundbreaking at the time. In one episode she realizes she has no female friends, to which Kramer replies "Of course you don't. You're a man's woman. You hate other women, and they hate you."
Brutal Honesty: Very often. Particulary with George's large-nosed girlfriend
Bungling Inventor: Every once in a while he comes up with an invention which he plans to use to start up his company "Kramerica Industries", but they never turn out so well. He also had the idea for a pizza place where you make your own pizza, which he almost got off the ground with help from Poppy, but the two got into an argument about pizza toppings reminiscent of a pro-life vs. pro-choice argument and abandoned the whole thing.
In one episode he suggests a restaurant that just serves variations of Peanut Butter and X sandwiches called "PB@J's". A few years later such a restaurant actually opened in California.
In another episode he and Frank come up with an idea for a male-brassiere that could stand to make them millions and has a bra company very eager to buy the concept off them, but it falls through simply because the pair can't agree on what to call it.
The Casanova: Claims to be this several times but Kramer had the fewest onscreen girlfriends of all the main characters, likely simply for the reason that his personal life gets explored the least on the show. This is made up for the fact that he tends to get much better (and harder to get) girlfriends than Jerry and George. Hell, the man got Uma Thurman's and Elle MacPherson's phone numbers, just like that. After all, "he's Kramer".
Friends Rent Control: Out of the show's nine year run, Kramer has held a legitimate job for all of four episodes. In one case, he wasn't even an employee of the company he was working at.
This is lampshaded by George when Kramer goes to a baseball fantasy camp.
"Why does Kramer need to go to a fantasy camp? His whole life is a fantasy camp. People should plunk down $2000 to live like him for a week. Do nothing, fall ass-backwards into money, mooch food off your neighbours, and have sex without dating. Now that's a fantasy camp!"
The Ghost: None of his oft-mentioned friends (Bob Sacamano, Jay Remenschneider and Lomez) have appeared on screen.
Justified by Jerry himself in Entertainment Weekly's "Special Seinfeld Issue," May 4, 1998, covering the entire run leading up to the finale. In the "Introduces" section of the review of "The Pony Remark," Jerry said that cousin Jeffrey and Bob Sakamono were never seen because "they became too large in our imagination for anyone to fill those shoes."
Lampshaded in one episode, where Jerry wonders to Kramer why he's never met any of these friends of his. Kramer responds that they're all wondering why they've never met him.
Go-to Alias: H.E. Pennypacker, as well as the last name "van Nostrand". Over the course of the show he's been Doctor, Martin, and Professor Peter van Nostrand.
Where Does He Get All Those Wonderful Toys?: Kramer has stated and been told numerous times that he has no job, but he frequently appears in episodes having purchased some bizarre, completely random, and expensive objects, objects like a professional-grade deli meat slicer ("The Slicer"), boxes and boxes of Cuban cigars ("The Bubble Boy", plus various other episodes), a high-end blazer, golf clubs, and a leather suitcase.
Kramer: Are you sure you don't have a fax machine? Because there's a lot of stuff in my apartment I've never seen before.
Ambiguously Jewish : He seems like it but isn't. He's a Italian Catholic, and one episode established him as being a big deal in his chapter of the Knights of Columbus, a Catholic organization. Larry David has stated George is half-Jewish on his mother's side.
Angrish: Jason Alexander has stated this is because Jerry Stiller often had trouble remembering his lines, and the gibberish he spouted was funnier.
Frank:(shouting) You couldn't smooth a silk sheet if you had a hot date with a babe.... (Trails off mid-sentence, soon speaking again in a calmer voice) I lost my train of thought.
Bi the Way: Briefly becomes a lesbian, but it "didn't take". It's implied that dating George is what drove her to lesbianism, since she hooks up with the woman George dated after her.
Butt Monkey: Big time, easily the biggest one on the show. Susan goes from being a respected NBC executive to getting vomited on, having her father's cabin burn down, finding out her father was gay, losing her job at NBC, and later getting killed by poisonous envelopes.
Control Freak: Constantly, George is such a doormat when it comes to her.
Dark Comedy: Her death and the gang's reaction to it are the best examples of this in the entire series.
Gentleman Adventurer: Presents himself as one, though it's unclear how many of his stories are true and how much are just his insanity talking (and since he revealed he was addicted to opium, so some may even be drug-fueled hallucinations).
Nice Guy: Not only very tolerant of Elaine's insanity but initially met her after he saw her crying on the street.
No Celebrities Were Harmed: He's a thinly (read: not remotely) disguised parody of John Peterman, the owner of the real J. Peterman Company. The real Peterman lost his company to a buyout in 1999, but with financial help from actor John O'Hurley he was able to buy it back.
No Celebrities Were Harmed: Barely. George Steinbrenner was a real person. For the record, he was a bit put-off when he heard the show was doing it, but quickly became okay with it (enough to actually cameo in an episode as himself).
Frivolous Lawsuit: Aids Kramer in a number of these, in particular he was very, very eager to "get a piece" of the tobacco industry. These lawsuits always wind up humiliating him due to Kramer's stupidity.
No Celebrities Were Harmed: An obvious parody of Johnnie Cochran. For the record, Cochran liked the performance quite a bit until Morris was preparing to do commercials as the character, at which point he asked him to stop.
Disproportionate Retribution: If you screw up the ordering procedure, to quote Jerry, "He yells at you, and you don't get your soup." When Elaine is banned for a year for doing an impersonation of Al Pacino. Al Yagenah (who served as the inspiration for the Soup Nazi), explained that the reason he has this rule is his soup stand was located in a cold part of town, where patrons had to stand outside before they could enter and order. Customers messing up their order, or requesting a change held up the line.
Ironic Echo: Has his own "No soup for you!" line thrown back at him by Elaine.
Only Known by Their Nickname: Kramer mocks everyone else for referring to him "so callously" as 'Soup Nazi', but offers no alternative appellation.
Jackie Chiles: Soup Nazi? You people have a pet name for everything.