1 C1 idiomatic slang
A euphemistic form of 'fuck off': to tell someone rudely to go away or leave you alone.
"When he kept bothering her, she finally told him to fack off."
inseparable
fack off
C1 slang inseparable intransitive
A euphemistic or written softening of the vulgar phrase 'fuck off,' used to tell someone to go away or to express strong disbelief or irritation.
In plain English
A softer way of writing or saying a very rude expression that means 'go away' or expresses strong surprise.
What does "fack off" mean?
2 meanings, ordered from most common to least. Color-coded by CEFR level.
2 C1 idiomatic slang
Used as an exclamation of strong surprise or disbelief (euphemistic softening).
"'They offered me the job!' 'Fack off, really?'"
inseparable
Usage tip
Not a standard dictionary entry. Used in informal written contexts (social media, text messages) to imply the expletive while appearing to soften it. Still considered offensive by many. Learners should avoid this expression entirely in formal or professional settings.
How to conjugate "fack off"
The five tense forms you'll use most often.
Base
fack off
I/you/we/they
3rd person
facks off
he/she/it
Past simple
facked off
yesterday
Past participle
facked off
have + pp
-ing form
facking off
continuous
Hear "fack off" in the wild
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