Top Definition
Sexual stunt in which a man lifts his scrotum in a swift, almost tossing-type motion, while simultaneously slapping his taint extremely hard. This is to be done in a practiced manner to the extent that the man can perform the act at the exact instant he begins cumming, causing his ejaculatory fluid to launch higher than ever deemed possible as a result of the taint slap.
"I have to clean the ceiling because Gerald pulled the ol' banana hammer puddin' rocket again last night."

"Paulie misfired practicing the banana hammer puddin' rocket and came in my eye!"
by banana hammer March 16, 2010

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