When you sit on someones lap in the backseat of a car, and allow yourself to be sodomized so you can still watch the drive-in movie screen. Often used to reference a method of payment for being taken to the movies which includes demeaning sex.
Melanie badly wanted to go see a new summer blockbuster at the drive in, but didn't have the money. So she used a trenton booster seat to get a dirty old cabbie to pay her way.
A Manly yet, cute boy. often girls fantasize over a Trentin. If the Trentin is disrespected by anyone he will snap and make the person's life very unenjoyable. the trentin is sort of tall with great hair, has a laugh and smile that would make girls take their clothes off in an instant. The sex organ on a trentin is also very impressive.
guy - "holy shit! how does trentin pull bitches so hard?!"