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A reference to the product after oral sex between two or more gay pirates, usually used to highlight their mutual sin.
Cook: Oi Shanks! What be that dripping from the first-mate's beard?

Shanks:Arg! That be the jolly captain's Cockrum dripping from his beard!
by Jan Smith July 27, 2006
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Any beverage, most commonly one containing some sort of alcohol, that tastes absolutely terrible.
"Man, that's some COCKRUM!" the man said as he spat out a mouthful of his warm, watered down beer.
by Stupid Julian February 12, 2008
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