nifkin Share definition Flag the space between a guy's ass and his balls; can be used as an insult Braden is a nifkin nifkin by Erin June 29, 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