Vocabulary
一皮剥く
ひとかわむく
to show someone's true colors; to remove someone's mask; to take the veneer off something
expression
verb
Example sentences
文明人（ぶんめいじん）も一皮（ひとかわ）むけば野蛮人（やばんじん）。
Scratch a Russian and find a Tartar.