n. A person who does drugs, neglects showering, has greasy hair, and wears alot of black. They usually do not try in school and can usually be smelled from a considerable distance. They are the social outcasts that seem like they might set the place on fire or blow it up, if given the chance.
An adjective that describes a person or people who holds a grudge against a certain person or party and seeks harm against them and the things they care most about.
"I thought Slade was Ollie's friend. I always knew he was dirty!"
"I would have given my life for her. After all this I find out she's a traitor and she's out to get me. I should have known she was dirty from the start".
This word can be used in many different forms. Most popular is to use it to express dissatisfaction in any given (mostly negetive) situation. It is so versitile that it can also be used in a sentence all by itself.