She has an ace up her sleeve for the final round.
ace up one's sleeve
idiomA surprise advantage of which others are not aware.
Origin
disputed originFrom the dishonest hiding of a high-value ace card for use during play, e.g. in the game of poker.
The team looked like they were losing, but the coach had an ace up his sleeve to win the game.
Although the negotiations seemed deadlocked, the diplomat kept an ace up her sleeve, revealing a secret concession that ultimately secured the peace treaty.
- 01
abound in one's own sense
To follow one’s own inclinations and opinions.
- 02
ace in the hole
Synonym of ace up one's sleeve.
- 03
act one's age
To behave in a manner appropriate to one's age.
- 04
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
- 05
afraid of one's own shadow
Exceptionally timid.
- 06
air one's dirty laundry in public
To reveal one's sordid secrets to the public.
- 07
air one's dirty linen in public
Synonym of air one's dirty laundry in public.
- 08
albatross around one's neck
A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.