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Meaning of hanger-on

hang•er-on

Pronunciation: (hang'ur-on', -ôn'), [key]
— pl. hang•ers-on.
  1. a person who remains in a place or attaches himself or herself to a group, another person, etc., although not wanted, esp. in the hope or expectation of personal gain.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.