kcuf Share definition Flag A polite way of spelling FUCK. Pronounced "cuf " When girls pose with that fish face they look stupid as kcuf . kcuf by Andrea DGeorge Nor-Cal July 6, 2016 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