a space between the two front teeth on the upper row of teeth in a male or females mouth. having a gap is considered a sex symbol (like beauty marks) and attractive. Recently, having a gap has been associated with overly sexual people, so to hear a girl being called a slut because she has a gap is not uncommon. Gaps are cute on girls and modelesque on men. Most people with gaps are sexually attractive.

A very sexy spread of the "buck" teeth that can, and will likely cause an orgasm to occur. the gap may be removed by getting braces