F.O.P. Share definition Flag Fucking Old Person I've been stuck behind this F.O.P. for 5 minutes F.O.P. by Brian Brian & Dave October 31, 2003 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug