perfectionist; enthusiast; zealot
Describes a person who is deeply absorbed in a hobby or pursuit, often to the point of being obsessive or overly meticulous. Similar to 凝り性, but 凝り屋 can sound slightly more colloquial.
See also: 凝り性 (こりしょう)
He's such an enthusiast that he spends a lot of money on his hobby gear.
That person is a perfectionist who can't rest until everything is done perfectly.
Standard kanji spelling.
Kana-kanji mixed spelling, common in informal writing.
Compound of 凝り (kori, 'obsession, absorption', from verb 凝る) and 屋 (ya, suffix for a person with a certain trait).