The retension of sperm within a woman's mouth after oral sex.
She held her cumboat!
by The Iron gianttttttt July 3, 2009
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The act of ejaculating onto a non porous surface (such as PVC mattress cover) and then sliding around on it.
Chris blew his load all over the bed, then cumboated around whilst his girlfriend looked on horrified. She did not approve of his cumboating fetish.
by RobRum January 5, 2009
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