Outcry of a chav.

Usually found uttered in NorthEastern schools, chavs will cry this when another does something the aforesaid chav considers unacceptable.
This usually includes doing work, talking to the teacher, or having a basic grasp of personal hygeine (something chavs unfortunately have not evolved to have).

See I wouldn't dare.

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.