stimpy Share definition Flag (n.) The idiotic, blubbering cat from ren and stimpy. Do something stimpy, i don't wanna have three butts! stimpy by Gumba Gumba May 24, 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