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Masturbating oneself by slapping the genitals in an aggressive and repeated fashion.
Roger loves the pain and pleasure derived from a goood slap fap.

Mary's pussy was red and swollen after her slap fap.
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by Eaton Holgoode April 11, 2017
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Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
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by ecogoth December 30, 2020
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2
When you slap your reproductive organ in the middle of fapping.
I did my first slapfap yesterday mom!
by slapfap February 25, 2015
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