A phrase to be said at anytime, but usually said in a cocky attitute to a person when you beat them in something or prove them wrong.
"I can't believe you just beat me in streetball on my home court," said Tra. "What's up then," said Quin.
by Quin and Tra March 30, 2008
often used when your wanting to fight someone
hey man i heard you wanted to bump,whats up then!!!
by mike the birdman January 28, 2006