Top definition
The act of rubbing one's mustache against another man's mustache, preferably while dressed as The Village People.
"Dude, i'm not going to shave for a month so we can have sweet caterpillar battles."

"Let me go get my leather biker cap, i'm going to battle the shit out of your caterpillar."
by LubedFerret February 22, 2014
Get the mug
Get a Caterpillar Battles mug for your papa Georges.