look up any word, like bae:
 
1.
Do something. Usually with purpose.
You wanna fight? Let's do it up bitch!
by connick March 04, 2003
 
2.
Meaning go for it.

Jim: I'm tired, I might go lie down.
Dani: do it up.
by duhani February 20, 2009
 
3.
A somewhat half-hearted verbal command used when a person agrees with another person's inclination to perform a task. The phrase is usually said hastily, and can also be stylized by stretching the first or the last vowel, depending on preference.
"Yayuhh, im tryin to get with herrr."
"doitup man."

"I should heat up those nachos."
"Good1 doituuup."
by slazer November 22, 2007
 
4.
The act of being boss and getting something done, usually in a very cool or gangsta way.
Bitch, shut yo fat-ass mouth! Let's Do It Up, skank!
by LuLuBee November 07, 2010