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.
by SpeedKills November 19, 2008
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