let sth slip
to tell people about something unintentionally:
He let it slip that he hadn't actually read the report.

[TahlilGaran] Advanced Learner's Dictionary ▲

reveal to let someone know about something that is secret or has not been known until now:
Doctors are not allowed to reveal confidential information.
It was revealed that he had smoked marijuana at college.
tell to talk about something to someone, so that they know about it:
Don’t tell anyone about this just yet.
Shall I tell you a secret?
disclose formal to publicly reveal something such as a fact or a name that has been kept secret:
The terms of the agreement have not yet been disclosed.
The agent did not disclose that there had been a violent crime in the house.
divulge //daɪˈvʌldʒ, də-// formal to reveal important or personal information which was previously secret or unknown:
The bank has refused to divulge its plans.
I’m afraid I cannot divulge what was said to me.
make something public to tell people about important information, especially after it has been kept secret:
Apparently they were engaged for some time before making it public.
The government has agreed that sources of financing should in future be made public.
leak to deliberately give secret information to a newspaper, television company etc, when a government or other organization wants to keep it secret:
The contents of the email were leaked to the press.
A man was charged today with leaking official secrets.
give something away (also spill the beans informal) to tell someone something that you want to keep secret:
He was careful not to give away any trade secrets.
I’m not going to give away how much I paid for it!
let slip informal to accidentally tell someone about something:
He let slip that he was envious of his older brother.

[TahlilGaran] English Thesaurus ▲

let slip
let (something) slip
to say something that you intended to keep secret.
She doesn't like to tell people what she's doing, but sometimes she'll let something slip.

From time to time, Alex lets slip an ugly comment about his colleagues.

Usage notes: also used in the form let it slip:
Pam let it slip that I'm not going to be promoted.

let slip (something)
to say something that you did not intend to say because you wanted to keep it secret.
Pam let slip an interesting bit of gossip yesterday.

Stupidly, I let it slip that they'd decided not to give him the job.
(often + that)

[TahlilGaran] English Idioms Dictionary ▲

let slip something
let slip (something)
to say something that you did not intend to say because you wanted to keep it secret.
Pam let slip an interesting bit of gossip yesterday.

Stupidly, I let it slip that they'd decided not to give him the job.
(often + that)

[TahlilGaran] English Idioms Dictionary ▲

let something slip
let (something) slip
to say something that you intended to keep secret.
She doesn't like to tell people what she's doing, but sometimes she'll let something slip.

From time to time, Alex lets slip an ugly comment about his colleagues.

Usage notes: also used in the form let it slip:
Pam let it slip that I'm not going to be promoted.

let slip (something)
to say something that you did not intend to say because you wanted to keep it secret.
Pam let slip an interesting bit of gossip yesterday.

Stupidly, I let it slip that they'd decided not to give him the job.
(often + that)

[TahlilGaran] English Idioms Dictionary ▲

let slip
tell a secret by accident
I let the date of the wedding slip out by mistake at the dinner party.

[TahlilGaran] English Idioms Dictionary ▲

let something slip
tell a secret by accident
I let the date of the wedding slip out by mistake at the dinner party.

[TahlilGaran] English Idioms Dictionary ▲

let slip
v. phr. To unintentionally reveal.
Ellen let it slip that she had been a witness to the accident.

[TahlilGaran] English Idioms Dictionary ▲