double-stack

(transitive verb): The act of having sex with two women at the same time. Technically this refers to instances where the women are stacked on top of each other, stomach-down. Colloquially, however, double-stacking is used to mean any act of a threesome where one or more men have sex with two women at the same time.
On this page, you will find 30 slang terms related to double-stack. Some of the top words include: bumping tacos, DVDA, Bump Pocketbooks, shaboom-shaboom, bi-penial, and 25 more.