become cocky and loud-mouthed; be swollen with overweening (/inordinate) arrogance; blustering; domineering;overbearing; swagger like a conqueror; be puffed up with pride
? 他們～，不可一世。Their arrogance reached a peak.
氣焰囂張qì yàn xiāo zhānɡ
氣焰：氣勢；囂張：放肆、猖狂。形容言辭和行動非常放肆，態(tài)度猖狂。be swollen with arrogance, blustering, be puffed with pride