Top Definition
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
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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