When something that is said or done degrates someone in a funny manner.
"Hey Steve, i'm saving my viginity until marriage."
"Really Tim? Well...thats cool i guess....im sure he'll be good for you"
"OHHH!!! THAT WAS DIRTY!!"
by Guinzo March 31, 2003
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Name for someone with some type of STD. Usualy it can be assumed with sluts and whores.
Guy A...so man what you do last night

Guy B...man i ended up fuckin that ashly chick.
Guy A...dude i hope you used a condom, that chick is dirty.
by jimster1989 February 16, 2009
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mixing cocaine with weed. straight from tha durty... 305!!
yo, u wanna hit dat dirty?
by angie February 24, 2005
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when you're doing something you're not supposed to be doing or you're being naughty.
driving a car while drinking alcohol.... dude's ridin' dirty.

or

a girl who grab's her boyfriend's crotch in public... she's such a dirty girl.

by juzdon August 17, 2006
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(Noun form):
A younger person who is a waste of space, has no marketable skills, is not overly attractive or hygenic, is extremely loud and obnoxious, and typically has a drug and/or alcohol addiction. They usually travel in packs that ride around in a shitty, beat-up car together. Their hobbies include showing up and ruining your friends' parties. Attempts to try and curb dirty participation at regular-kid parties have been made by attaching "no dirties" requests at the end of party invitation texts/facebook messages, but it is an uphill battle. The best hope to fight dirty-ism is by hoping that they have to move once their welfare runs out/they can no longer make thier house payments/their dads get busted for drug possession.
Don't tell ronny about the party. He'll tell a dirty, and then a whole pack of dirties will show up and lower my house's propery value.
by ihatebuffering March 6, 2011
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an extremely good looking, sexy person, mainly female
halle berry is dirty.....so am i!!
by nomuhle October 10, 2005
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