A term used mostly by white people after diss. the person who made the coment declares "throw it up" and a bystander or friend who herd will pretend to throw up an immagainary ball. this will then be spiked with an immaginary racket into the person who was insulted face. usuly ended by everyone around yelling BOOM!
Zach: your moms fat, Throw it up!
(some one dose)