noun-modifying (irregular)
eccentric; unconventional; peculiar; original
Describes a person, idea, style, or thing that is distinctly different from the norm in a striking or quirky way. Often carries a slightly positive or neutral nuance of uniqueness rather than outright strangeness.
彼は一風変わったファッションセンスの持ち主だ。
He has an eccentric fashion sense.
この店には一風変わった雑貨がたくさんある。
This shop has a lot of peculiar miscellaneous goods.
ユニーク is a loanword meaning 'unique' and is more neutral, while 一風変わった emphasizes a quirky departure from the ordinary.
Compound of 一風 (いっぷう, 'one style' or 'a touch') and the past form of 変わる (かわる, 'to change'), literally 'changed in a certain way'. The phrase is used attributively to mean 'of a different stripe'.