Sperm in a diaper from a male adult baby or male diaper lover.
Billy jacked off in his diaper and made some diaper cum.

Jessica rubbed Jason's diaper until he made some diaper cum.
by Ai Ai 73543745747 December 26, 2012
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A cloth object use to clean up cum dripping out of a girl after a cream pie

i.e. The literal shirt off a guys back, a towel, etc.
"I just shot my load in her, now I need a cum diaper to make sure it doesn't drip out everywhere"
by Cumguzzler96 February 8, 2015
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They can make them as thin as they want but it will always feel like a cum diaper.

Who left a dirty used cum diaper in my car?
by Denagnag September 17, 2009
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