The phrase 'Jack of All Trades, Master of None' refers to a person who is competent in many skills, but is not outstanding in any of them.
Example of use: Josh refuses to study one profession. He fails to understand that a jack of all trades is a master of none.
Interesting fact about Jack of all Trades, Master of None
The idiom 'jack of the trades, master of none' originates from Elizabethan English. The idiom was famously used by Robert Greene in his 1592 booklet 'Greene's Groats-Worth of Wit' where he refers to William Shakespeare with this idiom.
