body dysmorphia - definition and synonyms

noun [uncountable] 

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/ˌbɒdi dɪsˈmɔː(r)fiə/

or body dysmorphic disorder  /ˌbɒdi dɪsˈmɔrfɪk ˌdɪsɔː(r)də(r)/

  1. a mental illness in which a person believes that there are serious problems with their body that need to be fixed