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The act of filling a female's three holes with some steamy hot man meat, such that she becomes watertight and thus seaworthy.
Jenny became seaworthy when she went to that UO football party last weekend. I heard that three guys parked their pink buses in her fur garages at once. Bitch became more seaworthy than the fucking Titanic that night.
by RonaldReaganIsSexy June 26, 2014
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Used to descibe a fat person whose function in an emergency is being the floatation device
Person 1: We're all gonna drown!
Person 2: No were not.
Person 3: Look! That women is seaworthy. Grab onto her.
by it_was_a_friday_night January 24, 2008
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