When somebody spreads his ass cheeks and you spray lysol in his asshole and it turns into a foamy substance called ass foam.
Dan put his ass foam on Joey and joey said meheeeeeeee!!
by bubblehead December 10, 2004
2 parts shit 1 part cum.
Alex quickly pulled his dick out of his girlfriends ass producing wicked ass foam. She ass foamed everywhere, ruined the sheets.
by ohohface247 January 06, 2012
The result of explosive diarrhea that looks like a root beer float once it lays to rest in the toilet.
That Mexican food we ate last night gave me such bad ass foam.
by MiTaiSter September 18, 2009
the lather that forms on a horses ass when you ride it hard in hot weather.
The barista at Starbucks used ass foam for froth on all of her non-tipping customer's coffees.
by its_memike February 26, 2009