ikiru

to be livid; to try and come off as strong; to be cocky

Word type: u-verbs

Kanji: 熱る

Standard: ちょうしにのる/いきがる

Standard kanji: 調子に乗る/粋がる

Example:

あいつ、最近、いきってんなあ。どうしたんやろ。
I wonder why he's been acting out lately.