The typical sport that uses the term, "deuce", is Tennis or Table Tennis.
Deuce is where both players are on 40 in a match of tennis
Deuce in tennis means is 40 all :) as in 15 love, 30 love, 40, love and then if its 40 all peopel just call it deuce
deuce= 40 all or 40-40
Deuce in tennis is when both the opponents, doubles, or singles, have "40" points in which is called deuce. After the deuce point, the match is either over, or you go into "add" scoring.
In tennis, when both opponents are tied at 40-40, the score is called deuce. Deuce changes to advantage when one opponent scores after achieving deuce.
It is called a deuce.