inferiority complex
From Longman Dictionary of Contemporary EnglishRelated topics: Psychology, psychiatryinferiority complexinˌferiˈority ˌcomplex noun [countable usually singular] MPa continuous feeling that you are much less important, clever etc than other peopleExamples from the Corpusinferiority complex• This obviously affects them as they grow up, giving them an inferiority complex.• Atlanta is on a massive ego trip, mixed with a congenital inferiority complex that makes Atlantans overly eager to impress others.