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1.
An apparatus placed in the vagina after sex to absorb excess semen.
This semen running out of me is disgusting I really need a cumpon.
by Cumpon user July 30, 2011
 
2.
A piece of tissue, or any similar porous material inserted into the vagina after a spunk tsunami, used to ebb the flow.
To prevent further leakage onto the kitchen table, Jane hastily inserted a cumpon.
by Poomoj January 05, 2013