虚勢 きょせい
kyoseio haru

Godan Verb (ru)
Expression

1. to bluff; to act brave; to put on a bold front

「わはははは、心配 しんぱいするなっ!」オレはあえて虚勢 きょせい った。
"wa hahahaha shimpai suruna'!"orewa aete kyosēo hatta.
"Ha-ha-ha-hah! Don't worry!" I brazenly bluffed.