Not a sexual term, similar to ass plow. Ass Tractor usually refers to the entity that is doing the plowing.
Man, that bitch took a ride on the ass tractor when her boss found out she was smoking weed on her lunch break.
by monster rod von hugenstein September 25, 2003
1 more definition
An insult based on the combination of transportation methods and parts of the human anatomy, a great and innovative way to offend someone
1) Im going to heard your ass into a farm of pain with my ass tractor from hell BITCH
by Smegson P Donnohugh September 03, 2008