Stemmy Share definition Flag A derogatory term specific to Broken Hill; used to insult or belittle someone you dislike. You burnt the toast, you stemmy! Stemmy by squadbhiz June 13, 2016 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