Definition: A skin fire is a slang term for male masturbation. The result of the hand stroking the penis rapidly without lotion creates friction causing the skin on the shaft to turn red. If a male masturbates too hard the friction can create a fire. A skin fire occurs if the male masturbating rubs so hard that the friction creates a fire equivalent to rubbing two sticks together.
by Blueballbeauty June 21, 2019