Keester Share definition Flag Another word for the asshole. After giving a fabulous hummer, Sheila prefers to finish the evening with a cock in her keester! Keester by lick a lotta spokes February 1, 2005 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