shat ap Share definition Flag 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! shat ap by daxterg November 19, 2007 0 0 Get merch Get the shat ap mug. Buy Now — $32.95 See more merch