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the theory that, as a duck needs gravel to eat and digest its food, a man needs sex to live.
"Man, I'm taking you to the bar tonight. You need to get some gravel for your duck"
by old man dan March 01, 2008
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2
the theory that, as a duck needs gravel to eat and digest its food, a man needs sex to live.
"Man, I'm taking you to the bar tonight. You need to get some gravel for your duck"
by "OMD" February 29, 2008
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Get a gravel for your duck mug for your brother-in-law Bob.