新しがり屋

あたらしがりや
one who loves novelty
one who goes after all the latest fads

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あたらしがりや【新しがり屋】

a person who likes anything [everything] new; a person who is always following the latest fads; 《口》 a trendy.

●新しがり屋である love [《口》 go for] everything [anything] new; have a passion for the new; 《口》 be (a) trendy.