cum burn occurs when sperm is left on the skin long enough to dry, causing the person to rub long and hard enough to irratate the skin turning it a red sun burnt color
(1) I seen a chick who had massive cum burn on her face today.
(2) Put your shirt on dude, you got cum burn on your back.
(2) Put your shirt on dude, you got cum burn on your back.
by Random C October 20, 2009