Definition of “fat chance” - English Dictionary

british dictionary

“fat chance” in British English

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fat chance

informal

used to say that you certainly do not think that something is likely to happen:

"Perhaps they'll invite you." "Fat chance (of that)!"

(Definition of “fat chance” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“fat chance” in American English

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fat chance

infml there is no chance of that happening:

"Maybe they’ll invite you to go with them." "Fat chance!"

(Definition of “fat chance” from the Cambridge Academic Content Dictionary © Cambridge University Press)