Definition of hanger-on noun from the Oxford Advanced Learner's Dictionary

 

hanger-on

 noun
noun
BrE
 
; NAmE
 
(pl. hangers-on)(often disapproving)
 
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a person who tries to be friendly with a famous person or who goes to important events, in order to get some advantage a famous artist surrounded by crowds of hangers-on She arrived with at least 50 assorted helpers and hangers-on. The singer’s parties attracted the inevitable crowds of hangers-on.
See the Oxford Advanced American Dictionary entry: hanger-on