hole card
noun
Stud Poker.
the card dealt face down in the first round of a deal.
something held in reserve until it can be used to advantage.
Origin of hole card
An Americanism dating back to 1905–10
Words nearby hole card
holdout,
holdover,
holdup,
holdup man,
hole,
hole card,
hole in one,
hole in the heart,
hole in the wall,
hole of retina,
hole saw