Ok I don't know what all these other definitions are about, but a true grunion is a half-erect penis.
Bob has erectile dysfunction, whenever he doesn't take his medication he gets a grunion.
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Being given the shocker after recently playing the popular Xbox 360/PC game Bioshock.
Macy preordered Bioshock and the other day after she finished a 4 hour session we and my two buds gave her the Bioshocker.
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