eff
C1Informal, Vulgar, Slang
Definition
Meaning
Vulgar slang for the verb 'fuck'; used as a euphemistic replacement for the word.
Can also function as a general-purpose intensifier or exclamation, similar to 'hell' or 'damn', or as a placeholder verb meaning to mess up or ruin something.
Linguistics
Semantic Notes
Primarily used in the imperative form ('eff off') or in the phrase 'effing' as an intensifier. Its use and acceptability are entirely dependent on its function as a euphemism for a strong expletive.
Dialectal Variation
British vs American Usage
Differences
Usage is similar, though the imperative 'eff off' is particularly British. Americans might be more likely to use the full expletive or a different euphemism (e.g., 'frick').
Connotations
In both varieties, it carries the connotation of the original vulgarity, but softened. It can sound childish, humorous, or intentionally restrained.
Frequency
Low frequency in formal contexts; moderate in casual speech as a conscious euphemism. More frequent in the UK due to the popularity of 'eff off'.
Vocabulary
Collocations
Grammar
Valency Patterns
imperative: Eff off!transitive: Don't eff it up.intensifier: That's effing ridiculous.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “eff and blind (to swear profusely)”
- “eff off”
- “eff you”
- “eff it”
Usage
Context Usage
Business
Highly inappropriate and unprofessional.
Academic
Not used in formal academic writing.
Everyday
Used cautiously in very informal speech among friends as a euphemism.
Technical
No technical usage.
Examples
By Part of Speech
verb
British English
- Just eff off, will you?
- I've completely effed up the recipe.
American English
- Don't eff this up for us.
- He effed the whole project.
adverb
British English
- It's effing cold out there.
- He ran effing quickly.
American English
- That's effing awesome!
- She's effing brilliant at maths.
adjective
British English
- That's an effing disgrace.
- Where's the effing remote?
American English
- It was an effing nightmare.
- Get in the effing car!
Examples
By CEFR Level
- Oh, eff! I lost my keys.
- He told his noisy neighbour to eff off.
- I'm sorry, I think I've effed up the booking.
- The whole situation is just effing ridiculous.
- After effing and blinding for a minute, he calmly explained the problem.
- The politician was accused of effing up the economic recovery.
Learning
Memory Aids
Mnemonic
Think of the letter 'F' – 'Eff' is just how you say it, and it stands in for the F-word.
Conceptual Metaphor
DAMAGE IS PROFANITY (to 'eff something up' is to damage it via a metaphor of swearing at it).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with the Russian letter 'Ф' (ef). It is not a letter name in this context. It is a substitute for a very strong swear word (like 'блять' but not a direct translation).
Common Mistakes
- Using it in formal writing.
- Thinking it's a polite word—it's still understood as vulgar.
- Overusing it in an attempt to sound edgy.
Practice
Quiz
In which context would 'eff' be LEAST appropriate?
FAQ
Frequently Asked Questions
It is a recognised euphemism in dictionaries, but its status as a 'word' is solely as a substitute for a vulgar term.
No, it is inappropriate for formal contexts. Use neutral alternatives like 'ruin' or 'damage'.
It is a British idiom meaning to swear loudly and profusely.
They are synonymous euphemisms. 'Eff' is used as the verb/adjective ('eff off', 'effing'), while 'f-word' is usually a noun referring to the term itself ('he said the f-word').