Those nasty, ghetto, slutty chicks that block up the halls in your highschool. When you try to pass them you feel like you need a shower to sanitize yourself of the drugs and herpes that you were just possibly contaminated with. Usually characterized with big, baggy sweatshirts or hoodies and jeans with slits passed 5 inches up the side of the leg.

Any group of girls that aptly fit the term dirty.

Usually see in murderous packs at parties.

In Coquitlam B.C., we call a girl who's, not so clean, and usually very easy, a dirty.

an announcement of territorial domain when leaving a seat. Calling "dirties" will inform those nearby that you will return and that your seat is off limits.

any chick that gives sex. can or can not be hot, but although may not sound appealing, being with a dirty, doesn't make u dirty.

An ugly chick that a guy picks up. He may be blinded by her ungliness and doesn't mean to pick her up

Used by rave kids to define users of needle drugs, sp. methamphetamine, cocaine, and heroin.