Noisemade by niggers, especially raucous, larger groups observed to be whooping, hollering, and in general having little consideration for those nearby.
Theory coined by the prophet Afroman which claims to be the one, true method for selling crack to one's teacher. A close relative of trigonometry, but the similarities end at the rhyme unfortunately for us students.
"That's how you pass, trigonometry, sell crack to your teacher, use niggernometry" - Afroman, Bacc To School