deuce /djuːs $ duːs/ BrE AmE noun
[ Date: 1400-1500 ; Language: Old French ; Origin: deus 'two' , from Latin duos ]
1 . [uncountable] the situation in tennis when both players have 40 points, after which one of the players must win two more points to win the game
2 . [countable] American English a playing card with the number two on it
3 . what/how etc the deuce ...? old-fashioned spoken used to add force to a question:
What the deuce is going on?