noun
jack-of-all-trades; handyman; all-rounder
Refers to a person who can do many different kinds of tasks, often in a practical or informal context. Can be used positively or with a nuance of 'dabbler'.
彼は会社で何でも屋として重宝されている。
He is valued at the company as a jack-of-all-trades.
うちの父は家の修理から料理まで、まさに何でも屋
My father is a real handyman, from home repairs to cooking.
noun
A shop that sells a wide variety of everyday items. Less common than the person sense; often used in shop names.
駅前の何でも屋で文房具を買った。
I bought stationery at the general store in front of the station.
便利屋 specifically refers to a handyman service or a person who does odd jobs, often for a fee. 何でも屋 is broader and can refer to any versatile person or a general store.
雑貨屋 is a general goods store, similar to sense 2 of 何でも屋, but 何でも屋 can also refer to a person.
Compound of 何でも (anything) + 屋 (shop, person). The 屋 suffix is productively used for both shops and people characterized by a trait.