deuce

1a (1) :  the face of a die that bears two spots (2) :  a playing card bearing an index number twob :  a throw of the dice yielding two points

2 :  a tie in tennis after each side has scored 40 requiring two consecutive points by one side to win

3 [obsolete English deuce bad luck] a :  devil, dickens —used chiefly as a mild oath what the deuce is he up to nowb :  something notable of its kind a deuce of a mess