A method of swimming; you have front crawl, back crawl, breasts stroke, butterfly stroke and vinegar stroke. You prepell yourself through the water by girating your hips like your giving it to a woman.
You can prepell yourself backward using the same method...just by doing it on your back.

the pre-orgasmal point of no return for men during the sexual act, where failing to blurt your mess will result in blue balls

The often odd, varied and bizarre facial expressions a man make at the point when he is is just about to ejaculate. The same sort of faces you would pull if you had just quaffed a pint of vinegar.

the point of no return for a man during sexual intercourse in which he can not stop until he ejaculates, and looks as if someone put a spoon full of vinegar and made him smell it

as seen on "the league"

The point at which there is no going back when you are about to shoot your load!

The final moments prior to when a man orgasms. At this point he can no longer stop himself from ejaculating no matter what happens. He will make a face as though he has just smelled vinegar. It is said that if you peer into a man's eyes during his vinegar strokes you get a glimpse of his soul.

The face a man makes when he orgasms. It is said that when you look into a man's eyes while he has his Vinegar Strokes, you can see into his soul. Its also the point in sex where you can't stop and have to finish.

the face a man makes before he cums because it looks like he his smelling vinegar.