poos Share definition Flag someone who is being a wimp or a loser pronounced poose, like puss but with 'O's Dude, cut it out, you're being such a poos poos by Keenigit August 27, 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