1 definition by KingD303
A phrase to show your acceptance and/or and or approval of an idea or event. Or... if used in certain situations a way of expressing your discontent caused by a person's actions, ideas, or events.
a)1: what's good my homie?
2: not much man, just been chillin.
1: that's what's up.
b) so you're gonna side with them over me, huh? That's what's up.
2: not much man, just been chillin.
1: that's what's up.
b) so you're gonna side with them over me, huh? That's what's up.
by KingD303 April 10, 2016