1. (verb) The art of fucking a not so hottie whilest you buddy sneaks in trying to pull of a Sneaky Castro. Instead he decides to put his thumb into her pussy. While doing so the hair on top of his thumb tickles the bottom of you nut sack. Thus giving you a Terrisita tickler.
Hey Jack, Scott was fucking Mona the other night. So Tony slipped in and tried to finger her. He wound up giving Scotty the old Terrisita tickler. He ran off screaming. What a Lush