look up any word, like the eiffel tower:
 
1.
1. to enforce the laws or rules more vigorously

2. to make punishments for a crime or violation more severe

3. an instance of sense 1 of 2
The crack down on drug abuse means that fewer addictions will occur.
by The Return of Light Joker February 15, 2008
 
2.
The violent aggressive behavior of someone who is addicted to crack cocaine , when the effects of thier current hit of crack wears off.
When joe found out that his brother was going to be late in picking him up, he threw his coffee cup at the door smashing it swearing loudly. "oh darn" said Sue "Joe is having a crackdown.
by lovestodance August 16, 2010
 
3.
A Sandbox game for Xbox360 created by Microsoft
Boy 1 :Lets play crackdown splitscreen!
Boy 2 :But Crackdown doesnt have splitscreen remember!
by Josh Jolly November 28, 2007
 
4.
punitive focus of legal apparatus on anything the speaker/writer doesn't like: unpleasantly authoritarian action, frequently with an overt populist message.
crackdown
"the home office guarantees a crackdown on illegal immigrants." or
i promise to crackdown on the drunken yob culture in this towm" vows council chair.
by robin bale June 28, 2004
 
5.
A game for Xbox 360. About 99% of people the people who bought it only got it because it had the Halo 3 beta, and never actually played Crackdown itself. Had it not been for the Halo 3 beta, this game would have sold about 5 copies.
"You're playing Crackdown? What the hell?"
"Nah man, I just got it to play the Halo 3 beta."
by shaywon June 24, 2009