Gutter Topper

The last person to have sexual intercourse with a particular orifice in a gangbang, most often referring to the last party to enter and subsequently climax in an anal gangbang scenario.

"Hey Tod, Mary just texted me and she wants us to come over for another gangbang tonight."
"Nice, if Mikes coming he is probably going to call gutter topper again, that Mike is a dirty bastard"

"Nothing quite gets me going like Gutter Topping that ass after watching all the boys plow it" -Dirty Mike