Whatchaupta 

A one word question to determine what another is doing. Used as quick text to ask, "What are you up to?"

Whatchaupta?

Defining words on Urban Dictionary. Enyou?

Nothing more or less needed to make the sentence complete.

Whatchaupta by JasenWithAnE June 8, 2021

watchaupto

short for "what are you up to?"

when "what's up", "sup", "how's it going", and "how are you" just don't cut it

me: watchaupto?
friend: chillin bro, straight up chillin

watchaupto by outerbanx October 2, 2009

Whatchutalkinbout 

Request to provide clarification. Often used in a demanding fashion when an offensive question or statement has been made.
A question.
A complete sentence when used with or without a signifier.

Whatchutalkinbout Willis?
Whatchutalkinbout, (insert offensive slur here)? You'd better step back!

Whatchutalkinbout by Mister9 January 17, 2006