so dubbed in honor of the three rivers of Pittsburgh; before sex, give your girlfriend some horse laxative and then have normal, non-anal, unprotected sex. After climaxing inside of her box, give her the heimlich maneuver until she shits herself and then punch her in the mouth. The three streams of semen, shit and blood when simultaneously flowing create the Pittsburgh Lunchpail. Only for hard workers.
Girlfriend: I feel like some of the passion has gone out of our relationship.
Boyfriend: Well, I could always Pittsburgh Lunchpail that ass...
Girlfriend: I don't know what that is, but I trust you. Let's fucking do it.
This word is derived from the already published;Lunchboxslang word. Lunchpale is a derogatory word that describes a specific person that you do not like.
A lunchpaler or lunchpailer is predominantly a male who licks his middle finger and rubs it around the rim of his own asshole. Then scoops any lingering debris back into his mouth to literally eat his own ass.