v: The act of sticking a limb with a cast on it into your ass or another person's ass.
n: A cast that is in an ass.
Dave: I had a weird experience last night.
Tom: What happened?
Dave: I got an ass cast from my girl friend.
Tom: Aw, man! How thick was the cast?
n: the result of getting aroused while watching two dogs humping.
Dave: Dude, your dogs are really going at it!!!
Tom: Yeah, it's pretty awesome!!!
Dave: Dude, that's weird. Do you have a doner right now?
Tom: Uh.... I have to go.