howdy Share definition Flag a greeting used primarily in the southern part of the U.S. Short for "How do you do?" The man said,"Howdy" to the lady. howdy by MacTheHero April 9, 2003 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