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

1.
泄露秘密, 说漏嘴
to reveal a secret or surprise
:
•
Come on, spill the beans! What did you get for your birthday?
快,说出秘密!你生日收到什么了?
•
She accidentally spilled the beans about their surprise party.
她不小心泄露了他们惊喜派对的秘密。