Secret Idioms

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big mouth

Meaning: someone who talks too much

Example: Your big mouth always gets you in trouble at school, Steven! Read more ➺


black book

Meaning: a book containing a list of secret contacts

Example: Ann will not invite Bob to the party because he has been in her black books for so long. Read more ➺


skeleton in the closet

Meaning: a secret of an embarrassing, guilty or shameful nature that you don't want to disclose

Example: I have come to know that Eric has a skeleton in his cupboard. Read more ➺


spill the beans

Meaning: disclose a secret or reveal something prematurely

Example: Lauren finally spilled the beans. She has been promoted to manager, and it's going to upset some people in the office. Read more ➺


backroom boy(s)

Meaning: people who work in anonymity

Example: They left the technical problems for the back-rooms boys. They will make short work of it all. Read more ➺


under the radar

Meaning: Going unnoticed, avoiding unnecessary attention.

Example: She managed to stay under the radar during the investigation. Read more ➺


a little bird told me

Meaning: to receive information from a secret source.

Example: I'd like to believe that a little birdie told you about my secret, but I know exactly who it was that let you in on it. Read more ➺


behind closed doors

Meaning: in clandestine

Example: The planning board of the finance division constantly meets behind closed doors, in case its negotiations become known in advance. Read more ➺


in cahoots

Meaning: Secretly working together to do something dishonest or illegal.

Example: The cashier was in cahoots with the supervisor to steal money from the store. Read more ➺


card up sleeve

Meaning: to have a secret advantage that is suddenly revealed to change the game

Example: He did not just leave his house. He had a card up his sleeve that he did not even reveal to his family, which was his new flat in a posh locality. Read more ➺


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