狐假虎威 (hú jiǎ hǔ wēi)

lit. the fox exploits the tiger's might (idiom); fig. to use powerful

Character breakdown

Usage

他不过是狐假虎威罢了,没什么真本事。

He's just bullying people by relying on others' power; he has no real ability.

Tā bùguò shì hújiǎhǔwēi bàle, méi shénme zhēn běnshì.