the two on dice or playing cards

a doctored die having two deuces

the score of 40 all in a game, at which each player needs two consecutive points to win the game

the Swede pegged him back to deuce from 40-love

a marathon game that went to eleven deuces

used as a euphemism for ‘devil’ in expressions of annoyance, impatience, surprise, etc.

how the deuce are we to make a profit?

what the deuce are you trying to do?