In one of the Disney promos for the show, they get away with it again.
Linda (during her previous career as Lindana) had a belt that said "TOY." Presumably short for "BOY TOY," a reference to Madonna's risque wardrobe from the 1980s.
In "The Magnificient Few", Isabella explains how easy it is to get your Cow Milking badge. Complete with matching hand movements.
Isabella: All you do is squeeze and pull and squeeze and pull and squeeze and pull and squeeze and pull and...
The time machine in "It's About Time" was built by a man named Xavier Onassisnote "Save your own asses".
In the episode Raging Bully, Buford challenges Phineas to a fight after Phineas' ice cream drops off its cone onto Buford's pants. And no, it wasn't on the leg or anything like that. It was right on the crotch. Buford even stood up to show it.
In the episode "Dude. We're Getting the Band Back Together", in the song "History of Rock", Danny and the boys are going through different styles of music. They come across one with a very colorful and rainbow style background.
Phineas: So, what's this? Danny: This is Psychedelia; It's where the guitar solo came from. Phineas: No, I mean what's with all the colors? (music stops) Danny:(eyes shift nervously) I have no idea.
In "The Ballad of Badbeard," Phineas' grandfather tells the kids, "Left is right, and right is wrong." He's talking about moss, but in real life that saying comes from homosexuals' practice of wearing an earring on their right ear to indicate their orientation. As if to drive the point home, Baljeet dons an earring on his right ear when he and the other kids dress as pirates a couple scenes later.
In Bowl-R-Ama Drama, when the gyroscope is turned off in the giant bowling ball, the red ball that was used to control the giant bowling ball flies around the cockpit, and for a few scenes, Candace has it in her mouth like a ball gag.
In 'Does This Duckbill Make Me Look Fat,' Perry (in Candace's body) attempting to attack Doofenshmirtz with his...uh...tail. In just enough slow motion to make every single viewer feel uncomfortable. (There's also something distinctly disturbing about a grown man trapping a teenage girl in a cage. A very small cage. To be fair, however, Dr. Doofenshmirtz had no idea that Perry would have been in the body of a teen.)
In "Put That Putter Away", they were able to show dog feces uncensored. Normally on children's television, fecal matter cannot be shown whatsoever unless it's bird feces (and even then, it's only shown as white spots on cars).
"One Good Scare Ought to Do It" has a big one. When Phineas gets his idea to build a haunted house, Candace overhears and tries to put a stop to it until she becomes fed up and says, "That's it you little psycho, I'm calling mom! (slams door) (door reopens) "and I am not using the banana this time!" It Makes Sense in Context. What really sells it is Phineas' reaction.
Phineas: You guys heard that right? It wasn't just me?
Carl does the "pussy whipped" sound effect ("rrowr, wah-cheesh!") towards Major Monogram in "Chez Platypus" when MM complains that he's going to be in trouble with his wife if he can't figure out somewhere special to take her for dinner.
In the episode "Swiss Family Phineas", during Doofenshmirtz's explanation of how he wants to start a chain of "Institutes of Evilology", there is a blink-and-you'll-miss-it shot of the smoking skeleton of an infant on the table of one of his students.
"That Sinking Feeling": When Baljeet sees Mishti (his best friend from India) after many years, he notices that she has developed into a girl. The camera pans up Mishti's body, and Baljeet's stunned reaction is accompanied by heavy breathing and a "BOING!" sound effect.
In addition, there's a scene where Candace gets attacked by seagulls while trying to bust her brothers. Her mother hears the birds over the phone and says, "Candace, if you're feeding the geese again, I hope you're not wearing a tube top." Did they just reference accidental flashing on a kids' show? Yes, yes they did.
On multiple occasions in 'The Wizard Of Odd', they show a bear — makes sense, right? It is a The Wizard of Oz parody, after all. However, this bear happens to be sitting behind a tree, reading a newspaper. In The Stinger, he says "Yes, Yes I do." Wow. If you don't get it, the bear is referring to the classic rhetorical question, 'Does a bear shit in the woods?'
Near the beginning Buford and Baljeet are outside Candace's second story bedroom window. Candace asks "What are you on?" Buford responds "Do you mean in the metaphorical sense or literal sense? we're standing on a ladder" Baljeet only replies "I want to be cool" Did Baljeet just subtly admit to taking illegal substances?
The dancing in Isabella's song "What'cha Doin'". She and four Fireside Girls (Katie, Milly, Gretchen, and Holly) are all quite visibly humping the air. While she's singing about her catchphrase and her affections towards Phineas. Her stalker-crush gets slightly cuter and creepier every episode.
Near the end of this video, taken from the previews for "Rollercoaster: The Musical." And, unlike the dancers in the "Summer Belongs To You" ads, this shot REMAINS in the episode.
Not only is there the look on Ferb's face, but Phineas seems to hit his head on the. . . arches.
In "Rollercoaster: The Musical", during the song "Roller Coaster" Phineas and Ferb look at the camera, with half-closed eyes, one eyebrow raised each, while Phineas sings, "Scream if you want more!"
Also in the song, not only does Phineas seem to be completely aware of his friends fear, but he seems to be enjoying the terrified screams his friends.
In the episode "Candace Gets Busted", when Linda first suspects Candace is having a party, she tells Lawrence (who is wearing a self-invented "shower hat") that they have to go home right now and miss their trip. He actually asks "Would you like to yank my chain?" effectively making this a "pussy whipped" joke. And yes, she DOES pull it. Not to mention he says it with a lower voice than usual.
In "The Lake Nose Monster," Phineas shows Candace a book of photographic "proof" that Nosey exists. She rattles off each photo: "Driftwood, log, elephant, driftwood, driftwood, you aren't old enough to know what that is..., driftwood..." Keep in mind that Nosey is your stereotypical, long-necked sea serpent.
In "She's the Mayor", Candace is busting Phineas and Ferb when she is, well, the mayor. However, the sign for the event of busting them says "The Big Bust". Double Entendre much?
In "The Beak", the villain's name is Khaka PeŘ PeŘ. Need we say more?
In "Candace Gets Busted", Candace's party gets transported to Doofenshmirtz's pants, making a literal "There's a party in my pants" joke.
In "Elementary, My Dear Stacy", when Doofenshmirtz is introduced to Double-0 0.
Dr. Doofenshmirtz: So if he's "p" and you're "ooo", together you spell...
Double-0 0: No, they're not O's, they're zeroes, all right?
Dr. Doofenshmirtz: I was just going to say "ooop"... looks like I struck a nerve there!
In "Run Candace Run", the building agent mispronounces Doofenshmirtz's name and it sounds like douche. There is no way this is unintentional.
In "The Great Indoors" Jeremy's "What I like about You" song has "propagation of the species" in the lyrics. They basically got away with making a sex reference in a song where a teenaged boyfriend is trying to talk about what he likes about his teenaged girlfriend.
Speaking of that episode, in the end : When Jeremy is about to tell Candace what he likes about her, it gets cut by a soccer match. Overlaps with Bilingual Bonus if you pay attention to the words the announcer says just after Jeremy's dialog: Viene le pega, gol! which can get translate to He comes! He hits it! goal!
During "Canderemy", Doofenshmirtz manages to combine himself with Norm and a fridge. And then we get this:
Norm: (opens fridge) Would you like a nice, frosty beverage? Dr. D: Hey, that's private!
During the episode "Magic Carpet Ride", there's a blink-and-you'll-miss-it sight gag with the name of one of the stores: "Ell No."
In "Skiddley Whiffers" Candace at one point yells "Here comes the BIIIIG FINISH!" followed by "Ohhh that feels good!"
Also in "Skiddley Whiffers" Candace drags her mother away from washing the dishes. Is that a plate Linda's holding and rubbing with a towel? Why no, no it isn't. It's a human skull.
They own an antique store. One has to wonder why she's cleaning it with the towel she uses for the dishes, though. Ew.
In "Remains of a Platypus", we get this little charm from Doofenshmirtz. Keep in mind he's only wearing underwear, and talking about Perry.
Doofenshmirtz: Ugh. It's so hard to get good help these days, even when you ride them like a bicycle.
And in the same episode at one point, Perry is shaving Doof as his butler. He jumps down to his lower half and Doof gets a shocked look on his face....then it backs up to show he's shaving Doof's legs. Wow.
Carl likes to dress up as a squirrel and goes to squirrel-con, talking about people's "baleful looks of judgement". Sound like anything we know?
And this exchange from the episode "Buford Confidential":
Baljeet: Buford, what are you doing? Buford: The forest is filled with patch-crazed Europeans and I'm a bear in the woods. What do you think I'm doing?note See under the "Wizard of Odd" example in the Season 2 folder for what this is referring to. Phineas: Ooh! Ooh! I know! Buford: Am I on speaker phone? Get me off speaker phone!
While being very upbeat and cheerful, the lyrics of the song "Weaponry" from "Norm Unleashed" are... honestly pretty violent.
''You can beat 'em up by any means To blow them all to smithereens! The favorite of this sentient machine! Never mind the fatalities Where there's municipalities! To crush a system with the threat of weaponry!
In "What'd I Miss," Baljeet claims to have beaten Buford at Rochambeau. When asked what Rochambeau is, Phineas calmly replies, "It's another name for Rock-Paper-Scissors." While it is an archaic term for Rock-Paper-Scissors, in more recent years it's taken on a much different meaning thanks to South Park.
In "Minor Monogram" Vanessa has this exchange with Rodrigo:
Rodrigo: Join me, Vanessa, and together we will take over the world. I'll let you get a tattoo. I think boots should come in pairs, like people.
Vanessa: Join you? I don't work for him. That's my father, you dweeb.
Rodrigo: Well, yeah, I just thought we had a moment.
Vanessa: (scoffs) A moment?
Vanessa: Yeah, I know. What a dip, right?
When Vanessa says "dip" it sounds very similar to another word a girl would call a guy being a jerk.
In the winter-themed episode "For Your Ice Only", Ginger and Stacy argue over whose turn it is for use of the computer, Ginger tells her older sister that she'll "open a can of whipped cream on [her]. Or however that goes." No doubt, "Stone Cold" Steve Austin would be proud.
During "Happy New Year", we have Stacy and Jeremy both claming that Candace is having "relapses" with her busting habits.
In that same story, Isabella tells Phineas about how a New Year's tradition of kissing someone at midnight. Phineas says, in a suggestive sort of way, "I know what we're doing tonight..."
In the song "Fly On the Wall," sung from the perspective of Candace who has been turned into a fly, one lyric is "When you order from the menu, it's always number two." Flies... poo...
Ferb's comment joking that sorbet is made out of "fancy people" is pretty dark.
In "Der Kinderlumper," Doofenshmirtz accidentally moons Perry; the latter comes in while the former is building an -inator while wearing ski underwear that unbutton at exactly the wrong time.
"Primal Perry" has the first Baljeet clone being hit by a truck. This might not sound too bad on its own, but keep in mind that scene was played for laughs.
Something that got past the radar during the promos for "Summer Belongs To You" but was later apparently censored for the actual broadcast was a very quick little shot in the Bollywood-style music video for "Rubber Bands" that was shown to promote this episode, with some of the dancing girls running across the screen in barely their bikinis. They were later given pants like the rest of the girls for the official episode release. Odd, considering that the same dancers had a cameo in Carpe Diem (Roller coaster the musical) without the censorship.
Once again, same episode. Specifically, during Isabella's song (In the City of Love), there's a shot where Isabella has her and Phineas' portrait painted. The artist turns the painting to the screen, revealing that Phineas has been staring intently at a windmill in the background. Isabella turns around and Phineas is still staring at the windmill... which happens to be attached to France's most famous strip club.
Phineas and Ferb The Movie: Across the second dimension in Fabulous 2 D
This line from the song "Robot Riot":
"Cause your sister is a fridge, And you know her light is always on!"
Also in the "intimations about your family" category, earlier lyrics include: "Cause you're momma was a blender and your dad was just a washing machine"... as in low-class, menial laborers.