noun
a person who attaches themselves to a group or individual, typically for personal gain or advantage
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The wealthy socialite was always surrounded by a group of hangers on at her parties.
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He's just a hanger on, always trying to be part of the cool crowd.
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Those hangers on are just looking to mooch off of someone else's success.
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Negative thoughts can be like hangers on, clinging to your mind and weighing you down.