偉えらぶる

godan verb (-ru), intransitive verb

put on airs; act self-important; swagger

Describes someone behaving as if they are more important or superior than they really are. Often used critically or humorously.

• 彼かれは昇しょう進しんしてから急きゅうに偉えらぶり始はじめた。

  After his promotion, he suddenly started acting self-important.

• あの先せん輩ぱいはいつも偉えらぶっていて、話はなしにくい。

  That senior colleague always puts on airs and is hard to talk to.