Throwing a Frisbee is a social ploy to leave two prospective mates alone. As in, if you and these two would be lovers are out with your friends, and the sparks start to fly, you might say "Who's up for a game of Frisbee?" knowing those little happy pucks aren't going to jump in, thereby leaving them to make out wildly.

To have sex secretly in one's empty house; often associated with cheating in a relationship.

It means to take the hint/ go for it

It is also a rad sex move involving hammocks, duct tape and whip cream

1: The motion in which you pretend to masturbate.
2: Not caring or giving any fucks