Two straight men engaging in mutual masturbation.
Dude, me and Ted got so drunk and horned up last night we ended up trading skins.
by The Brat August 15, 2006
When two men who are engaging in sexual activities create enough friction by rubbing their penises together to the point of which they have rubbed off skin on each other.
"Bro, I just got done trading skin with Betty White in the bath 10 minutes ago."
by Valterain April 28, 2015