YMMV: 21 Jump Street
- Ear Worm: "Say JUMP! Down on Jump Street!"
- Fridge Logic: How many high schools are in this unnamed city? You'd think after a while, they'd have to solve another crime at a school they'd already attended, which would cause lots of trouble if anyone remembered them (even the faculty was usually kept in the dark about the operations). Or a student who went to one high school where they were undercover, transfers to another school where they're undercover, and recognizes them. What if a student has friends who go to another school? Can you see the gang ever coming across someone they had to socialize with on a previous assignment?
- Similarly, how many schools in the city can end up with new students suddenly transferring in with the semester already in progress, who turn out to be cops? You'd think at some point teachers and school administrators would have some urban legends going around and be wise to the ploy.
- Hilarious in Hindsight: The episode "Fear and Loathing with Russell Buckins", in which Hanson's bad-boy storyline plays as a PG-rated version of Fear and Loathing in Las Vegas. Johnny Depp would later star in the film version of said novel.
- Ho Yay:
- Hanson and Penhall. Like whoa. Though frequently diverted by various conveniently placed girlfriends. Not to mention Hoffs almost sleeps with Penhall in season two. Because they're both totally straight.
- In one episode, Hanson is shot in the line of duty and Penhall tells Hanson, "If I could kiss it and make it better, I would." It's an egregious example when one considers where Hanson was shot.
- Narm: The theme song, especially in the first season.
You're gonna learn something when we see you after school!
- Retroactive Recognition:
- Josh Brolin in "My Future's So Bright, I Gotta Wear Shades". He and Johnny Depp were the two finalists for the role of Hanson.
- Jason Priestly and Pauly Shore in "Two for the Road".
- Christina Applegate in "I'm OK- You Need Work".
- Christian Clemenson in "Raising Marijuana".
- Brad Pitt in "Best Years Of Your Life".
- Stoic Woobie: Tom Hanson most of the time, but especially in season 2's "Orpheus 3.3" in which his girlfriend, Amy, is shot and killed during a convenience store holdup - it happened in 3.3 seconds based on the surveillance tapes, and Orpheus was a musician in Greek mythology who went to Hades to try and retrieve his late girlfriend.
- Crosses the Line Twice: Schmidt tries to shut up a family friend at the store who almost blows his cover in front of Eric by shoving her against a table of shoes, and then saying she tried to grab his dick.
- When the coach got his dick shot off. After he stops complaining a bit, they go "is that it?!" and point to half a hot dog. He then tries to grab it with his mouth.
- Dude, Not Funny!: The trailer for the movie has a scene where the police captain, played by Ice Cube, asks the two officers played by Tatum and Hill if they're autistic, intending it as an insult. That didn't go over very well with the autistic community.
- Ensemble Darkhorse: Captain Dickson.
- Ho Yay: Jenko and Schmidt; they both frequently "wrestle" with one another in the film, and the movie makes a point of how Schmidt is unable to ask anyone to the prom without screwing up or chickening out. Him asking Jenko is the only time he does it without error.
- One-Scene Wonder:
- Johnny Simmons as Billiam, the student who first shows just what the HFS drug does. It's hilarious.
- Johnny Depp and Peter DeLuise reprising their roles from the show.
- Popularity Polynomial: Played with. Using both backpack straps = desperately uncool in 2005, simply how you carry a backpack in 2011.
- Retroactive Recognition: Fifty Shades of Gray's Dakota Johnson as Fugazy.
- The Scrappy: Schmidt's mom is known for being pretty annoying.
- At the climax, Schmidt shoots off Mr. Walters' dick, and the latter tries to pick it up with his mouth.
- Schmidt's romance subplot with Molly can be this if you're put off by the 7-year age difference.
- At least the film goes out of its way to specify that Molly's 18, to ward off potential pedophilia accusations.
- They Wasted a Perfectly Good Plot: A Jerk Jock bully running into his former victim while they're at a police academy and becoming friends while they help each other overcome their weaknesses would be a pretty good film on its own.
- What an Idiot: Schmidt's mother — despite being told on multiple occasions that Schmidt & Jenko are undercover and she can't tell anyone, she still tells a family friend who cannot keep a secret & nearly blows his cover.
- What Happened to the Mouse?: Phyllis, the chatty family friend who nearly blows Schmidt's cover when she keeps talking about him being an undercover cop even after he told her he was undercover, disappears from the film after Schmidt shoves her into a display and accuses her of molesting him.