The sound a person , presumably male , makes when having sex and his testicles slap against his partner's skin.
"I wet smacked Carol last week so that she would make me a sandwich "
by Locomon007 May 12, 2014
a sloppy kiss on the cheek or the lips
Ewww. Stop it Lew! Did you have to give me such a wetsmack?
by tjf December 12, 2007