look up any word, like cunt:
 
1.
thats wats good.
person says: "yo I just got this/these hot new (shoes, job, CD, car, etc.)
you say:"THATS WHATS UP!"
by BaBiedoll November 26, 2003
 
2.
something is cool, or your giving credit to someone for doing something
Hey Troy i got them tickets to see scarface. (Troy says " thats whats up!")
by victoryia October 15, 2006
 
3.
Meaning that you fully understand and/or agree and find yourself excited about the idea or suggestion proposed.
Friend 1: "Yeah so I'm thinking we chill before, and then hit the club by 9. Got mad beer at the crib anyway"
Friend 2: "That's what's up"
by KelsBels April 05, 2008
 
4.
To show approval of a person's achievement.
"You got accepted to Harvard? That's what's up, dude."
by Bianca Burton June 17, 2008
 
5.
Something that is exciting, great, and agreeable.


cool the shit the bomb These are just a few synonyms.
"You won a million dollars? That's what's up!"
by dd3953 December 30, 2008
 
6.
A way of agreeing to what the other is saying. Or if they ask you a question it can also mean that you are down to do what they're asking.
1:"Ay mayne, i got this killa, we blazinituptoday?"
2:"Shiiiit, that's what's up!"
by MonalisaelisaDelafusa April 08, 2009
 
7.
Used to agree with something, To say you like something, When you don't know what else to say, and when you don't know how to answer a text.
-I'll be there later.
-That's whats up.

-So, I'm bored.
-That's whats up.

-Wanna get burritos?
-That's whats up!!
by I'mwhatsup(: February 11, 2010