noun which may take the genitive case particle 'no', na-adjective
Describes a person who is highly skilled or competent, often in a specific field or task. Used attributively with の or as a な-adjective.
See also: 腕利き (うできき)
彼は腕っこきの職人だ。
He is a highly skilled craftsman.
腕っこきな料理人を探している
I'm looking for a capable chef.
noun
able person; person of ability
Refers to a person who is skilled or competent. Often used as a noun to praise someone's ability.
See also: 腕利き (うできき)
あの大工は本当に腕っこきだ。
That carpenter is a real master of his craft.
Synonymous; 腕利き is the more standard form, while 腕っこき is a colloquial variant with a slightly rougher, more emphatic feel.
Colloquial variant of 腕利き (うできき), with the 利き (きき) replaced by the emphatic っこき, likely from 扱き (こき). The exact derivation is uncertain, but it carries a similar meaning of 'skillful' or 'able'.