A sport where you go and rub your butts against or "surf" random crotches, on a crowded bus or train. This is a variation of crotch catching, but for people who are shy to use their hands or for people with big asses which makes not playing crotch surfing impossible.
Brenda upon entering the subway: "Hey ya'll. Surfs up! Time to surf some crotches"

Shaniqua: "Because of my gigantic ass, I'm crotch surfing even when I'm not playing. I can ride 6-7 waves at a time. What can I say, I'm a pro."

Eric: "Guys, I severed my hands playing crotch catching. Now I can only crotch surf"
by crotchsurfer August 15, 2010
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