up the ass Share definition Flag A form of saying you have so much of something, you literally have to say "up the ass." When using "up the ass" pronounce "the" as "thee". Jeff has baseball cards up the ass. up the ass by Corzocl April 13, 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