It's when you are too cool to say what's up?
Source. Barney Stinson.
Whattup with you these days.
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saying "What's up" in a shorter way and in one word
"whattup john"
"yo james, hows it gping"
"good"
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A Term Meaning "Hello" Often Said By People Over The Age Of 45
It Is Also Frequently Said By Arthur Ford In Stress Level Zero's Boneworks & Bonelab
"Whattup Son"
"AAAAAHHHH"
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