Ass Mash
Getting your ass handed to you by a Wal Mart employee.
Going through the 20 item express checkout line with more than 20 items will result in a ass mash beat down. Watch out!
Mexican Ass-mash
When you put a burrito on your dick and proceed to fucking somebody in the ass-hole.
Oh man, I gave her a Mexican Ass-mash last night, and when I was finished, her ass-hole was deep, dark purple. It was awesome!