Common Sense Note
Parents need to know that 21 Jump Street is an often crude (but irreverently funny) action/buddy comedy based on the popular '80s TV series that launched Johnny Depp's career. This version stars popular actors Channing Tatum and Jonah Hill as bumbling cops who attempt to redeem themselves by going undercover to bust a high school drug ring. The storyline leads to plenty of drug content (there's also pot smoking and some underage drinking), and you can also expect lots of strong language (including "f--k," "s--t," and more), crude references, and sexual innuendoes.
Sexual
Content
Three people are shown in a state of undress while in the middle of a sex act (though there's no graphic nudity); in an end-credits scenes, two couples are seen together. Also lots of crude language and sex talk, including discussion of teens hooking up and/or wanting to. Some kissing and sexual gestures; genitalia are drawn on family photographs and also can be glimpsed briefly in a non-sexual context.
Violence
Lots of it, but generally played cartoonishly (and lots of slow-motion scenes). A character rejoices when his friend shoots someone (it's a gross-out moment); guns are drawn and pointed at someone's head. Though most of the fight scenes are cartoonish in nature, blood is shed. And cops rejoice after arresting and shooting people.
Language
Very frequent use of strong language, including "f--k," "s--t," "ass," "bitch," "p---y," "prick," "d--k," "damn," "hell," "goddamn," and "oh my God" (as an exclamation).
Social
Behavior
21 Jump Street's main message is that friendship trumps high school stereotypes and popularity contests -- as long as you keep an eye on what's important (relationships) and what's not (your position in an imposed hierarchy).
Consumerism
It's a teen movie, so the products that teens use -- laptops, phones, etc. -- are on display. But there's not a lot of label-dropping.
Drugs / Tobacco /
Alcohol
The plot centers around the arrest of a drug ring that deals in a high school; they've created a synthetic drug whose effects have been chronicled on a website. The video has gone viral, and the 21 Jump Street agents have to stop the drug from spreading, too. There's also pot-smoking and some underage drinking at parties.