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Yomi
はらぐろい
Rōmaji
haraguroi
Type
idiom
Literal Meaning
black belly
Meaning
(look nice on the outside yet) be evil/malicious on the inside
Antonym
素直, 裏表のない
Additional Info
It’s often used to describe a person who acts like a good person but actually has malicious or mean thoughts inside his/her heart.
Example
彼女は腹黒いから、心(こころ)の中(なか)で何を考(かんが)えているのか分(わ)からない。
Because she is evil on the inside, we have no idea what she’s thinking in her heart.