[ace in the
hole] {n. phr.} 1. An ace given to a player face down so that other players in a
card game cannot see it.
When the cowboy bet all his money in the poker game
he did not know that the gambler had an ace in the hole and would win it from
him.
2. {informal} Someone or something important that is kept as a surprise
until the right time so as to bring victory or success.
The football team has a
new play that they are keeping as an ace in the hole for the big game.
The
lawyer's ace in the hole was a secret witness who saw the accident.
Compare:
CARD UP ONE'S SLEEVE.
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