baq Share definition Flag a slang term for oh shit, fuck, what the fuck, thats fucked up, or you just got slapped. Mike: I just found out my ex-gf cheated on me with 2 dudes and I've been having unprotected sex with her for 6 months. Gabe: BAQ! baq by naggernensky May 15, 2009 0 0 Get merch Get the baq mug. Buy Now — $32.95 See more merch