dating a guy or girl that someone else tossed out like the trash

This phrase is not new; the full phrase is "to take the Mickey (out of someone)"
Britons have been using this figure of speech for decades, if not centuries. A "Mickey" of course, is a "Mick": a pejorative, racist term for an Irishman (so nicknamed because so many Irish surnames begin with Mc- or Mac-) It is a common stereotype, in both the UK and USA, that Irish men have volatile tempers, like to brawl, and make good boxers. So, To "take the Mickey (out of someone)" means to take the fight, the vigor, the gravity, the self-importance out of them, by mocking them, usually in a very subtle way.

When going down on a woman she places her partner in a triangle choke(a ju jitsu move) and begins choking them out. During the choke out the partner begins eating her out and if she gets off before he passes out she lets go.

In the sims2 game, if the player has installed a swimming pool after which the player removes the ladder but leaves the diving board, the sim will jump in the pool and not be able to get out, subsequently their energy will zero out and they will die. Synonomous with setting someone up to remove themselves instead of doing the wetwork and unnecessarily exposing themselves to prosecution.

A suxual act where the male puts his balls into the female's vagina.

Jumping out a window.

To remove the male genital organ (the penis) from the females genital organ (the vagina) immediately before ejaculation, with the intent of avoiding impregnation. It also has the secondary effect of making clean-up significantly harder, since the mess, instead of being inside of the female, is now all over her stomach or back.