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1.
Dried plug of semen blocking proper urethral flow. Usually created if a man doesn't urinate after sex. Extremely painful, but temporary.
"I thought I had kidney stones for a sec there...turns out it was just a cum cork."

or

"That cum cork came flying out and landed on Jack's toothbrush."
by MontgomeryQ July 28, 2008

Words related to Cum Cork

cork semen come cum hilarity jism plug urethra
 
2.
That extra bit of semen that stays in your urethra post-ejaculation.
Dude, after banging my girlfriend, I took a piss and shot a massive cum cork
by Allybabba March 20, 2012