2 guys and a girl
2 girls and a guy
3 gay guys
the logistics are a pain in the ass, though
Person One is a slice of bread... Person Two is a slice of bread... Person Three is the ham...
Get the picture?
a heterosexual three-way sex session, involving either two men and one woman or two women and one man; as opposed to a "choo-choo' (which involves three gay men or three lesbians)
Last night I got sandwich action with Gina and Maria!