A sexual act performed by one girl, thirty guys and a merry-
go-round. To do this, the girl kneels on the edge of the merry-
go-round and the merry-go-round is given a swift spin. As the merry-go-round spins, the girl then gives
head to each male in the circle, creating a seemingly endless circle of blow jobs.
Jimmy: Hey, did you get the dirty thirty?
Leo: No, I can't drink, there are exams this week.
Jimmy: No, I mean the dirty thirty from Nafer.