When a man slaps his balls against his gooch or thigh.
Ex: Dude, that was a loud boom clap!

Ex: Can you stop boom clapping?
by boom_clap_king June 10, 2013
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to have sexual intercourse, especially sodomy, with (someone) {trans.}

(of two people) to have sexual intercourse {intrans.}

Adopted in particular by young homosexual males after the hand game known as "boom snap clap" was popularized by Miley Cyrus.
Joe's goodbye to Stevie was tearful as the two of them had been boom snap clapping for the past several months.
by grashness July 26, 2010
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An exotic form of the "clap" STD that is contracted from sexual encounters with Hannah Montana and/or Miley Cyrus, either at the same time or in quick succession from each other. When both Miley and Hannah are present, the disease is also known as the "boom dee clap dee clap". This can lead to AIDs and/or swine flu, typically followed by death.
"I went to see "Hannah Montana: The Movie" and contracted the boom dee clap."

"Who didn't? That girl gets around"
by Nick Jonas!!!!1 May 4, 2009
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