Top definition
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
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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2
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
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3
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
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5
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
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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
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