become cocky and loud-mouthed; be swollen with overweening (/inordinate) arrogance; blustering; domineering;overbearing; swagger like a conqueror; be puffed up with pride
❍ 他们～，不可一世。Their arrogance reached a peak.
气焰嚣张qì yàn xiāo zhānɡ
气焰：气势；嚣张：放肆、猖狂。形容言辞和行动非常放肆，态度猖狂。be swollen with arrogance, blustering, be puffed with pride