eff
1 Americanverb (used with or without object)
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effs,
present (3rd person singular)
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effed,
past participle, past
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effing
present participle
noun
verb phrase
abbreviation
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efficient, efficiency.
-
effective, effectiveness.
verb
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taboo euphemism for fuck
eff off
-
slang to use obscene language
Other Word Forms
Derived Forms
Inflected Forms
Participles
Conjugated Forms
Present
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effsimple
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effssimple
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have effedperfect
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has effedperfect
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am effingprogressive
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are effingprogressive
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is effingprogressive
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have been effingperfect progressive
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has been effingperfect progressive
Past
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effedsimple
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had effedperfect
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was effingprogressive
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were effingprogressive
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had been effingperfect progressive
Future
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
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
GMT07:35 35 mins: Worth noting that, improved as Chelsea have been, with Willian, Oscar and Hazard in particular doing good work, Cesc Fabregas has done the square root of eff all.
From The Guardian ● Nov. 29, 2015
That’s the Uruguayan River Plate, eff why eye:
From The Guardian ● Aug. 24, 2015
At length he discerned the label inside the "eff" hole.
From Abe and Mawruss Being Further Adventures of Potash and Perlmutter by Montague Glass
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
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“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
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.