A sandwich, made of ass and poo. From a Jack Chick parody strip.

Being the vehicle stuck between the jackass going below the speed limit and the jackass riding your bumper because of it.

ALSO a term used for a group of 3 or more people who stand right in the middle of an isle or walkway to have a conversation, oblivious to the all people trying to get around them.

The act of planting one's ass on another's face, usually after they've been overserved and are passed out on a couch or bed. Proper form "fits" the butt crack atop the nose.

Your head accidentaly/on purpose gets put between two asses

1. a bad day
2. horrible event
3. bad food
4. McDonalds

The act of inserting a piece of bread, meat, or cheese between the cheeks of someone's ass, including your own, with the direct intention of feeding it to someone too drunk to notice.

having sex, getting laid