gaff off
C1 slang separable transitive
In simple words
To accidentally or deliberately reveal someone's secret or catch them out.
Meanings
1 C1
idiomatic
slang
To reveal or expose someone's secret, plan, or deception, either accidentally or deliberately.
"He nearly gaffed off their whole operation by mentioning the warehouse in front of the wrong person."
Grammar: separable
Usage notes
Derives from 'gaff', a British slang word for a mistake or blunder (also 'blow the gaff' = reveal a secret). 'Gaff off' as a phrasal verb is rare and largely restricted to certain British regional or subcultural dialects. 'Blow the gaff' is a more widely recognised equivalent.
Commonly used with
accidentally nearly somebody the plan the whole operation
Forms
Base
gaff off
I/you/we/they
3rd person
gaffs off
he/she/it
Past simple
gaffed off
yesterday
Past participle
gaffed off
have + pp
-ing form
gaffing off
continuous
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Synonyms
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