"Jack of all trades, master of none" is a figure of speech used... - dofaq.co
jack of all trades, master of none

"Jack of all trades, master of none" is a figure of speech used...

wikipedia - 08 Jul 2015
"Jack of all trades, master of none" is a figure of speech used in reference to a person who has dabbled in many skills, rather than gaining expertise by focusing on one. An alternate phrasing says "Jack of all trades, master of none is oftentimes better than master of one."

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