Nonce. Child Molestor. Someone who craves the touch of a paper slit surrounded by candy floss.
"To do a Tripp" - Groom an child of the female persuasion online, before meeting up for lurid sex in a parking lot.
I can't believe my father has been a complete tripp!
Did you hear about that weird dude from high school?
Yeah man, I heard He did a tripp.