Definition of “blow sb out” - English Dictionary

british dictionary

“blow sb out” in British English

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blow sb out

UK informal
phrasal verb with blow uk /bləʊ/ us /bloʊ/ verb blew, blown

to disappoint someone by not meeting them or not doing something that you had arranged to do together:

She was supposed to go to that party with me, but she blew me out.

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