spill the beans
REVEAL ALL, tell all, give the game away, talk, let the cat out of the bag, blab, come clean

[TahlilGaran] Dictionary of Contemporary English ▲

spill the beans
to let secret information become known.
My husband was afraid to spill the beans about the cost of his purchases.

[TahlilGaran] English Idioms Dictionary ▲

spill the beans
to tell a secret to someone who is not supposed to know about it
"Please do not spill the beans about my plans to quit work and return to school next year."

My friend promised not to spill the beans about my plans to get married.

[TahlilGaran] English Idioms Dictionary ▲

spill the beans
v. phr., informal To tell a secret to someone who is not supposed to know about it.
John's friends were going to have a surprise party for him, but Tom spilled the beans.
Compare: GIVE AWAY³, LET THE CAT OUT OF THE BAG, TELL TALES OUT OF SCHOOL.

[TahlilGaran] English Idioms Dictionary ▲