What does はしゃぐ mean?
はしゃぐ is a Japanese verb meaning “to make merry; to frolic; to be in high spirits” in English. It is written as はしゃぐ in hiragana, and hashagu in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
そんな些細なことで、鬼の首を取ったようにはしゃがなくてもいいじゃない。
There's no sense acting all triumphant like a conquering hero over such a minor thing.