Top definition
When an individual, who, already in possession of a single phallus, be it real or artificial, dons a second phallus in order to have penetrative sex with both phalli at the same time.
Baby, fancy a Double-Mixer? I've got a strap on! (to be pronounced in a sing-song voice)

Hey ladies, fancy a Double-Mixer? I've got a strap on! (to be pronounced in a sing-song voice)
by Bigsby Hornsworth June 13, 2010
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