Cracking the bun off the cheese

When your having anal sex and you slip your dick through a slice of American cheese and continue to rupture her anus, hence the name, cracking the bun off the cheese.

An example for Cracking the bun off the cheese:
“Yeah Susan, Earl was taking me down to pound town and then he grabbed a slice of American cheese and stuck it in the wrong hole and he cracked the bun off the cheese.”