Top Definition
Abbreviation, meaning 'Shut the Fuck Up and Play!!' usually used in online games where chat profanity is censored. Used when some players are annoying the crap out of you talking about nothing.
IKillzN00bz357: 'So dude, that was a nice headshot, CrossFire's so sweet, i love it, myeh crap i died again...'

Pissed Kid: 'STFUaP DUDE!!!! You SUCK!'
by Matt-0 June 27, 2009
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