English · Slang Attested

blow the gaff

In real, traceable use. Part of the curated seed collection; community review is coming.

Sense 1

Both English Tiếng Việt

Meaning · English

To disclose a secret.

Nghĩa · Tiếng Việt

Tiết lộ bí mật

Machine-translated — suggest a fix

Examples

But, my child, if Geoffrey is to be got out at this immature stage it blows the gaff completely. Half of the crowd will vanish, including all the worst, and we shall have no proof at all of the real depths of the conspiracy.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org). Figurative class: Metaphor (PIE-English corpus, CC BY 4.0, retrieved 2026-07-31).

Sense 2

Both English Tiếng Việt

Meaning · English

To inform against a person.

Nghĩa · Tiếng Việt

Tiết lộ thông tin về một người

Machine-translated — suggest a fix

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Common questions

What does “blow the gaff” mean?

To disclose a secret.

Is “blow the gaff” formal or informal?

blow the gaff is generally slang.

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