Pinche Guey Share definition Flag Mexican slang. Usually used as in insult as in you Fucking idiot or fucking asswhole Meda tu pinche guey! You fucking idiot! That wasn't funny you pinche guey. (asswhole) Pinche Guey by LinkTRI4CE June 10, 2008 0 0 Get merch Get the Pinche Guey mug. Buy Now — $32.95 See more merch