ménage à trois /(mā̇`nȧzh" ȧ trwȧ)/

mé·nage à· trois

ménage à trois

n.
  1. A relationship involving three people, especially one in which three people live together and have sexual relations, such as a married couple and a lover of one of the pair.
  2. A single sexual encounter in which three people participate.
  3. An unlikely situation in which a group of three people not normally associated with each other participate in an activity together. [figurative]
    For the first time in World Championships history, two racers shared the first-place gold medal. Maier and Kjus arm-in-arm on the podium, with Austrian Hans Knauss just .01 seconds back from making it a menage-a-trois.