meaning "what do you mean?"
it is a shortened version on "what are you going on about?" or "what are you talking
usually used when someone is not making sense for extended periods of time or if you feel like you've missed something.
can be lengthened to show complete
and utter confusion.
knobhead: dude. i totally
just pwned that n00b. i asdfghjkl
; the ask;nfw. fo shizzle
my nizzle dizzle.awesome
: what you on about?
knobhead: so, tomorrow, then?awesome
knobhead: we can go and you can meet them, yeah?awesome
person: what you on about?
Gavino Free(roosterteeth): what you on about?