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don't bet on it

(also I wouldn't bet on it) informal

Definition

used to tell someone that you think something is unlikely to be true or to happen: "Do you think they'll give me back the money they owe me?" "I wouldn't bet on it."UncertaintyHesitatingAchievable
(Definition of don't bet on it from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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