A perfect ass which tucks at the bottom which distinctly separates the the bottocks from the upper back thigh. It cannot be found on a male individual. Tuck ass can be so powerful it can cause uncontrollable twitches much like epileptic seizures, and also makes one yell "TUCK ASS!" in a very stereotypical southern accent with a slight stutter.
hell yeah! that TUCK ASS made me have an epileptic seizure and yell in a stereotypical southern accent with a stutter!