up (one's) sleeve

(redirected from up their sleeves)

up (one's) sleeve

Of a plan or advantage, kept in secret so it can be utilized if and when it is required. A reference to cheating at a card game by hiding a favorable card up one's sleeve My stamina is the ace up my sleeve for this race—the other runners don't stand a chance! I've got a few tricks up my sleeve if he decides to pursue legal action against me.
See also: sleeve, up

up (one's) sleeve

Hidden but ready to be used: I still have a few tricks up my sleeve.
See also: sleeve, up