spill the beans
US /spɪl ðə biːnz/
UK /spɪl ðə biːnz/

1.
洩露秘密, 說漏嘴
to reveal a secret or surprise
:
•
Come on, spill the beans! What did you get for your birthday?
快,說出秘密!你生日收到什麼了?
•
She accidentally spilled the beans about their surprise party.
她不小心洩露了他們驚喜派對的秘密。