Grease Trapped
When a man gets trapped by a women that "accidentally" forgets to take her birth control when she says she is taking or should be taking her birth control.

(This does not apply to a man and a women who are truly in love)
(Guy#1) "I was seeing a chick for about three months. She was at my house every night and she turned down the heat in her apartment to save money. The pipes in her apartment ended up breaking because she turned down the heat too far. So, being the nice guy I invited her to live with me rent free until she could save money and get her own place again. After about six months she still had never cleaned my place, never offered any financial help, her unfolded laundry was stacked long my wall and the sex sucked and went down hill since the first month. I was sick of her lazy bull shit. The day I was going to ask her to move out, she told me, " I'm late"

(Guy #2) "Your fucking shitting me!?

(Guy#1) "So after two years of living in my house rent free and I'm trying to make it work for the child. She tells me that she is deliberately not cleaning to piss me off. Then a week later I catch her in a trailer home with another guy. At that point I can't gut her anymore and I give her the boot. In the ended she spread her legs, forgot her pill while deliberately not cleaning a household that was offered to her for free and now I'm paying her child support. She totally fucking Grease Trapped me!"

(Guy #2) "Fuck! What a Prostitute on a String!"

(Conversation was witnessed at a bar in downtown Wilmington, NC in March of 2012. The rest of the conversation was about what Grease Trapped and Prostitute on a String entailed. Not every day you can hear the origin of sayings.)