Definition of “woe betide sb” - English Dictionary

british dictionary

“woe betide sb” in British English

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woe betide sb

said when there will be trouble for someone, or someone will be punished, if they do a particular thing:

This is the second time he's been sent home from school this month, so woe betide him if it happens again!

(Definition of “woe betide sb” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)