Top definition
A fifty gallon barrel of steamy man smegma that is bought and traded on the open market. The demand of these barrel's directly reflects the amount of salty cum you may find in a rotten cunt's dirty mouth.
Hey Bob, did you see how much cum Wanda drank last night? It must have been at least a Barrel-O-Cum!
by jtcjr13 July 31, 2009
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