When you mistake ejaculating for urinating while having intercourse.
I was with my girl last night and accidentally hit her with the golden pump.
When a woman tugs on a man's flaccid penis while urinating. She tugs on it in a fashion so that she is getting sprayed like gasoline coming out of a nozzle.
Guy 1: Gina is such a whore.
Guy 2: Why, did she offer to give you a golden gas pump?
Guy 1: Yeah, and I totally went for it.