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Literally, an explosion of cum. Cum that shoots the accordian right off your lap, and the Santa hat off your head.
"Richard pumped the accordian on his penis, until he enjoyed a fine CUMSPLOSION. He was so rubber-legged he fell on the icy walk as he left. Best Christmas ever.
by kevmulk September 17, 2008
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2
a. While having sexual relations individuals involved simaltaniously orgasm.

b. to cum together
Nick and Beth had a cumsplosion while having sex in the shower that could be heard through out the apartment.
by Teddy H. December 07, 2007
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3
When a male ejaculates profusely covering everything in the way of his cum shot.
guy #1: I'm gonna need like 50 more rolls of paper towels in that bathroom!

guy #2: What happened?!?!

guy #1: cumsplosion....
by backstreetFORlife September 27, 2009
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