flow fucker Share definition Flag someone who cuts other people waiting in line is one who fucks with the flow of a line. Hey flow fucker, you just cut all 8 of us in line. You just fucked with the flow of this line. flow fucker by uabaycat09 May 7, 2020 0 0 Get merch Get the flow fucker mug. Buy Now — $32.95 See more merch