Get That Ass Up . Probably something you would text/IM/email , etc. a lazy friend . You can even use it when motivating someone .
*Texting convo *
"Hey you tryna chill today , play some ball ? "
"Nah I'm spending the day inside , on the couch, doing nothing. "
" Man , come on GTAU ! "
Player :Oh god coach , I'm really tired .
*flops on the ground*
Coach : MAN ! GET THAT ASS UP AND GIVE ME FIFTY PUSH-UPS !