The act of using your foreskin to slap the forehead; resulting in a thunderous clap.

The Foreslap is performed during foreplay.

The sound is the result of air expulsion from the crevasses of the foreskin.
Dave "how was it lastnight?"
John "bro it was fantastic, I gave her a foreslap and followed up with a hitesh"
by CSleezy February 3, 2012
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