Satislap
That oh-so-satisfying slap you deliver to a friend that has recently developed a relationship he won't shut up about. 99% of the time, it is aimed at the crotch, and results in an equally satisfying grunt from the love-struck guy. Normally only performed if the guy in question has been talking incessantly about his new sexy-time buddy for days. Can also be done with a foot. Or a knee. Or a sledgehammer.
Dave wouldn't shut up about his new sexy friend Emma, so we gave him a Satislap. But he wouldn't shut-up, so we gave him one with our feet. And then he still wouldn't shut up, so we bought a sledgehammer.