noun
jeanist; person who looks good in jeans; denim lover
Wasei-eigo colloquial noun for someone who wears jeans well or is a denim enthusiast. Often used in fashion contexts.
wasei-eigo (Japanese-coined English), from jeanist
彼女は本当にジーニストだね。どんなジーンズも似合う。
She's a real jeanist. Any jeans look good on her.
ジーニストの彼は、デニムの歴史にも詳しい
As a denim lover, he's also knowledgeable about the history of denim.