Naked football
People get naked and fight like they're in a cage match. Teens do it all the time. Sometimes the guys and girls team up. Sometimes they fight each other like it's the final round of a championship.
My friend played naked football with his crush and now he can't look her in the eye.
I saw a guy get tackled and fall on his face like a total fool.
My cousin played naked football and now he's got a broken nose.