威張る
いばる · ibaru · JLPT N2 · verb-godan
to swagger
🦚 威張る = authority (威) + stretch out (張る): stretching your status wide
威 means might or authority, as in 威力 (power) and 権威 (authority). 張る means to stretch or spread, as in 胸を張る (to puff out your chest). Together they mean stretching your authority wider than it really is: to swagger or act important.