Gap Share definition Flag The space between the thighs on a female body, just below the crotch. A gap is indicative of a slim figure and is very sexy. Steve: "Wow! Check out the gap on that chick!" Darryl: "Hot stuff. I'm going to go get her number." Gap by Hayz February 16, 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