Wild, drug and/or alcohol fueled sex that takes place next to the welcome cover of a dumpster in a suitably dark alley.
We slipped out of the show for some dumpster sex...I bent that little slut over the hood of a car, started chowing her box from behind. She really went wild when I whipped out my johnson and shoved it in, riding the skin fish all the way to Tuna Town! It was fuggin' GREAT dude.
Sex with someone that has no emotional value, but for both parties to get off. It's location can be any meaningless location that is convenient to both parties. Because of its singular purpose, dis-robing is not necessary & will only prolong the departure of both parties, possibly adding conversation & intimacy to the situation.
Person 1: I just just had meaningless sex!
Person 2: No, you had dumpster sex.