man friday
[noun]
Synonyms: right-hand man, girl Friday, right hand

[TahlilGaran] English Synonym Dictionary ▲

ˌMan ˈFriday noun
a loyal and trusted servant or helper. This name comes from a character in the book Robinson Crusoe by Daniel Defoe. He is a black man who becomes Crusoe's servant and friend after Crusoe saves him from being killed by cannibals (=people who eat other people). Crusoe calls him Man Friday because he met him on a Friday.

[TahlilGaran] Dictionary of Contemporary English ▲

a man Friday
a person who does many different types of usually not very interesting work in an office.
The ad said, 'Person Friday required for general office duties'.

[TahlilGaran] English Idioms Dictionary ▲