noun
jean jacket; denim jacket
Wasei-eigo from English 'jeans jumper'; refers to a casual jacket made of denim, similar to what English speakers call a jean jacket or denim jacket.
wasei-eigo (Japanese-coined English), from jeans jumper
春はジーンズジャンパーがちょうどいい。
A jean jacket is just right for spring.
彼はジーンズジャンパーを羽織って出かけた。
He threw on a denim jacket and went out.