When you have sex sans condom. Used in reference to the risky nature of such an endeavour.
Always use a hat skin diving can get you in trouble.
by red5 March 10, 2005
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Performing the act of cunnilingus on a completely shorn vulva.
Brohim, my gal got laser hair removal so now I’m skin diving instead of muff diving.”
by HR49 August 18, 2022
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