sidekick

[ sahyd-kik ]
/ ˈsaɪdˌkɪk /

noun

a close friend.
a confederate or assistant.

Origin of sidekick

An Americanism dating back to 1900–05; side1 + kick

Example sentences from the Web for sidekick

British Dictionary definitions for sidekick

sidekick
/ (ˈsaɪdˌkɪk) /

noun

informal a close friend or follower who accompanies another on adventures, etc