Beer Fag Share definition Flag When a Toughy Hairy Straight Man engages in gay sex. Brian went all beer fag last night. After two pitchers, he bent Jan over a barrel and gave it to him. Who'd have thought Brian was gay. Beer Fag by BeaversCleavage March 22, 2010 0 0 Get merch Get the Beer Fag mug. Buy Now — $32.95 See more merch