A rash or reddening of the skin between the thumb and pointer finger from holding down the taught waistband of a pair of sweats or boxers to easily access your junk for a good wank. Usually on the left hand, Thumb Burn is only realized after the masturbation session is complete. Every true man gets Thumb Burn once in their life.

Large, beautiful breasts that are keep well consealed and initially appear to be much smaller and less impressive than they actually are until unleashed.