Someone's sidekick is a person who accompanies them and helps them, and who you consider to be less intelligent or less important than the other person.
[informal]
His sons, brother and nephews were his armed sidekicks.
...a dim-witted sidekick.
sidekick in British English
(ˈsaɪdˌkɪk)
noun
informal
a close friend or follower who accompanies another on adventures, etc
sidekick in American English
(ˈsaɪdˌkɪk)
US
noun Slang
1.
a companion; close friend
2.
a partner; confederate
Examples of 'sidekick' in a sentence
sidekick
She usually plays the hapless sidekick to a comedy hero.
The Sun (2010)
He has a pencil moustache and a trusty sidekick, a little terrier.
Times, Sunday Times (2012)
He gives only tantalising glimpses of his relationship with his former sidekick, Maconie.
Times, Sunday Times (2007)
The Lord Mayor is acquiring a new sidekick in the new year as senior programme manager.