Definition of “be hung up on sth” - English Dictionary

british dictionary

“be hung up on sth” in British English

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be hung up on sth

to be extremely interested in or worried by a particular subject and spend an unreasonably large amount of time thinking about it:

Why are you so hung up on getting everything right?

(Definition of “be hung up on sth” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)