A twisted way of telling one to shut up.
Danni: I'm gonna go out with my girlies tonight, get pissed have a good nigh...
by Dannielle_Baxter June 12, 2008
1 more definition
VERB: To tell a co-worker that they need to stop talking; derivative of "shut up" localized to Santa Barbara region of California
Kelly told me that "expiry" was a real word, so I told her to shat ap!
by daxterg October 31, 2007