abreviation of "what are you"

An abbreviated way to say "what do you".

aword used by rappers (rap music)means what do you.

Shortened way of saying "what are you upto" or "what are you doing"

It is word used sometimes by Mexicans.
Whatcha is short for "Watch Out" Or Simply "Look"

It's a slang-y version of "What are you doing?", a question that expresses our interest in other person's recent or present actions.

Something a lad says when he can't think of what he is trying to 'whatcha-call-it' say.