uki Share definition Flag An adjectival shortening of the word Ukrianian. Lets head over to the Uki museum. I have to wake up early for Uki school on saturday morning. uki by Danyo Hentisz August 20, 2004 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