A thigh gap is a space between the inner thighs of some people when standing upright with feet Many women and men have found it difficult to achieve a thigh gap, leading some to resort to extreme dieting or even surgery in order to try to. Just Thigh Gaps We Thought You'd Enjoy. By: Dougy. In: Fit Girls, Hot Women, Hotness, Mind the Gap. Apr 3, Liked! 85 Disliked.