jack–of–all–trades 
/ˌʤækəvˌɑ:lˈtreɪdz/ noun
plural jacks–of–all–trades /ˌʤækəvˌɑ:lˈtreɪdz/ noun [count] : a person who has many skills : a person who can do many different jobs ◊If you are a jack-of-all-trades, master of none, you can do many things but are not an expert in any of them.
