A term for a two-headed dildo. These are generally used for stimulation between two homosexual female partners, although they can be used in a heterosexual context with more than one woman involved, or used on a man for heterosexual or homosexual sex.
"sorry dude, i can't come by right now, or later either for that matter. I'm with gina right now, then I'll be headed over to laura's. It's a regular double header!"