http://www.filmtrophy.com/

In jokes upon in jokes. Looks like a smelly bomb.

21 Jump Street stars Tatum and Hill as recent police academy graduates Jenko and Schmidt: two dim-witted cops whose (sorta) youthful looks and man-child attitudes make them prime candidates to participate in a newly-resurrected program where police officers work undercover at a local high school (a reference to the original 1980s TV series starring Johnny Depp).
The program’s foul-mouthed “angry” leader, Captain Dickson (Cube), assigns the pair to take down a local synthetic drug ring which is being operated via assistance from certain high school students. Much misbehavior and wackiness ensues.