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  • eff
    eff
    verb (used with or without object)
  • eff.
    eff.
    abbreviation
    efficient, efficiency.

eff

1 American  
[ef] / ɛf /

verb (used with or without object)

  • effs,
    present (3rd person singular)
  • effed,
    past participle,  past
  • effing
    present participle
  1. fuck.

    Stop effing around and get to work!

    Eff you, you lout!


noun

  1. the word “fuck”; the f-word.

    peppering his speech with superfluous and highly offensive effs.

verb phrase

  1. eff off Go away!.

    Eff off and die, you piece of Martian scum!

eff. 2 American  

abbreviation

  1. efficient, efficiency.

  2. effective, effectiveness.


eff British  
/ ɛf /

verb

  1. taboo euphemism for fuck

    eff off

  2. slang to use obscene language

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Etymology

Origin of eff

1940–45; euphemism for fuck, with eff as spelled form of the name of the initial letter

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Almost everyone spells it out, saying “en eff tee.”

From The Verge Jun. 6, 2022

“I spend good quality time with my husband, I like to go eff around in the garden for a while. I get massages. I get my toenails painted – whatever,” she says with a laugh.

From The Guardian Sep. 25, 2020

Saints deserved far more than the square root of eff all they got from recent visits to Anfield and the Tottenham Hotspur Stadium, while Burnley have recently won at Old Trafford.

From The Guardian Feb. 15, 2020

That’s the Uruguayan River Plate, eff why eye:

From The Guardian Aug. 24, 2015

"These people want to know eff we'll tak' in boarders?" said Latimer, by way of introduction.

From In the Van; or, The Builders by John Price-Brown

It explains why so many older women develop that fabulous “no effs given” attitude that sends them barging into the front of any line they see.

From Los Angeles Times Sep. 27, 2022

His esses are like zeds, and his effs are like vees.

From "The Inquisitor's Tale" by Adam Gidwitz

“My condolences to Paltrow, Kardashian, Mr. Dog, Pratt, & Katy effing Perry...and of course all the other self interested rich ppl in LA.”

From Los Angeles Times Nov. 17, 2022

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