"You know what you doing" first appeared in a game for the Sega Genesis called "Zero Wing", along with the phrases All your base are belong to us and You have no chance to survive, make your time.

One uses this phrase to point out that the listener is or the listeners are capable of finishing some task.
Alexander: I'm going to call the guy, and convince him that we are right about this.
9001: You know what you doing!
Alexander: Thanks for the encouragement.
by datniggapimmdechinchilla June 7, 2010
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A response used towards someone who undervalues a thing bestowed upon them. They obviously do not realize the value nor the perks of the thing.
Platonic boy friend: Merry Christmas!!! What did you get?
Platonic girl friend: I got a gift from my uncle, he got me these Sennheiser headphones, HD 660 S I believe
Platonic boy friend: WTF??? Wow I am jealous lol, that's a very luxurious headset. So do you like them??
Platonic girl friend: Eh it's okay
Platonic boy friend: ..... what you do mean it's okay?!? Do you not realize how blessed you are????
by Obv troll is obvious January 4, 2021
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Said when your bored and you want to talk with someone who is also bored, filler.
What are you doing?
Nothing

What are you doing?
Women
by Cheez March 22, 2003
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A question asked by your online buddy.
Upon reading that, you feel the urge to reply with the terms "your mom."
E: Hey man, how's it going?
A: Good.
E: What are you doing?
A: Your mom.
E: WTF??
A: That's right, I'm doing your mom.
by E ain't no Wanksta August 19, 2003
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This phrase is a form of trash talk commonly used while shouting at really bad kids, who quite frankly, dont know what they are doing.

Usually associated with Halo 3, where you completely rape the other team. Tsquared asks Walshy it all the time.
"WALSHY WHAT ARE YOU DOING!? WE JUST GOT 25 UNCONTESTED SECONDS IN THE MIDDLE!!!"

"OGRE WHAT ARE YOU DOING!?"
by Butterrzz December 3, 2009
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a playful game of touch-each-other's-genitals in public, with the aim of 1: arousing the partner and 2:having the fun of playing a dirty game and not getting caught. remember to keep all your clothes on to play, otherwise it's just handjobs!
by Bite me, my love. November 11, 2002
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