noun
bluff; false show of power; bold front
Refers to putting on a show of strength or confidence to intimidate or deceive, often when one is actually weak or unprepared.
彼の強気な態度は虚勢に過ぎない。
His tough attitude is nothing but a bluff.
虚勢を張って交渉に臨んだ。
He entered the negotiations putting on a bold front.