fappy Share definition Flag A feeling of emotion; in the mood to fap, or masturbate. Tim was very fappy last night- he went through three boxes of tissues! fappy by The Des July 22, 2006 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