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1.
The face you make when having an orgasm. Similar to the "O Face" but lasts the whole experience.

Gets its name from the fact that the pleasured person contorts their face in such a way as to look like they're in agony, but in reality, are much happier.
"Dude, I just found a whole bunch of You Tube videos with chicks filming their beautiful agony as the masturbated"
by DodgyBarnet September 05, 2006