Sash Off Share definition Flag An alternative way to say "f*ck off". Sash, meaning "f*ck", is a more appropriate and publicly acceptable word with which one may curse. Guy 1: *being a f*cking dickwad* Guy 2: Ahhh! Sash off! Sash Off by Seminal Fliud October 24, 2019 0 0 Get merch Get the Sash Off mug. Buy Now — $32.95 See more merch