Top definition
When performing anal sex. the woman starts to turtle head as the man busts a load simultaniously. while this is happening the man grasps the womans hips and shakes her vigerously. thus a rusty protein shake.
I have to wash my bad sheets. my girl spilled my rusty protein shake all over it.
by true imagination June 05, 2009
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Donkey Punch Plush

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