Dirty frisbee
The act of shitting on your partners chest and sitting on it so it is flat and compact. Then flinging it to each other like a frisbee.
Sam and Mary played with their dirty frisbee all night.
Dirty frisbee
A small, ditsy blonde, who could be the captian (or co-captian) of the cheerleading squad, who is frequently passed around for sex by members of a close friend group, or a sports team. More than likely, the lacross, hockey or football team.
How did you not know Jessica was a dirty frisbee? She's slept with everyone on the hockey team on more than one occasion.