和英辞書

大人ぶる

verb

to act like an adult (when one is not)

彼女はまだ子供なのに、いつも大人ぶって行動する。

Even though she is still a child, she always acts like an adult.

意味（1）

to act like an adult (when one is not)

バ〰カ、何(なに)大人(おとな)ぶってんだよ‼俺(おれ)たちだってまだまだ未(み)熟(じゅく)者(モン)だろーが‼ふり返(かえ)ってんじゃねェ‼——だろ？

Ba~ka, nani otonabutten da yo‼ Ore-tachi datte madamada mijukumon darō ga‼ Furikaetten ja nē‼ ——daro?Cut it out, will ya? You’re talking like you were so mature or something! We’re still much too ‘green’ to be looking back now! Am I right?