niú​pí

boasting

牛皮 niú​pí
boasting noun
boasting or big talk; bragging

He always likes to brag; hardly anything he says is true.

cowhide noun
cowhide or leather made from cattle skin

These shoes are made of genuine cowhide.

tough adjective
flexible and tough; durable

This paper is very tough; it won't tear no matter how you pull it.

Frequency

Movie subtitles
1.13 per million appears in 1% of films
Written text
7.24 per million

Sources

Definitions
CC-CEDICT