The act of washing one's manlihood in the
sink, most commonly practised with
water although on VERY rare occasions (once)
done with mouthwash.
He decided a quick 'Slossing' was needed in order to freshen up in preparation for doing the "uhh."
I was on a
promise, but after throwing shapes all
night I knew I'd have to give
my balls a quick 'Slossing.'