Flube Share definition Flag The lube and other matter mixture that is expelled from the anus after anal sex with lubricant into the underwear you just put on. Last night, after my pimp drilled my hole, I flubed all over my boxers. Flube by addisonfl July 3, 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