noun
mole under the eye
A mole located beneath the eye, traditionally believed to appear because of frequent crying. Often considered a beauty mark in modern contexts.
彼女の右目の下には泣き黒子がある。
She has a mole under her right eye.
泣き黒子は泣き虫の証拠だと言われることがある。
A mole under the eye is sometimes said to be a sign of a crybaby.
黒子 is the general word for a mole or beauty mark anywhere on the body, while 泣き黒子 specifically refers to one under the eye.
Compound of 泣き (crying) and 黒子 (mole), from the folk belief that such a mole is caused by crying.