最容易泄露真相的是眼睛
[zuì róng yì xiè lù zhēn xiāng de shì yăn jīng]
The phrase means 'Eyes Most Easily Reveal the Truth'. It suggests that one's eyes reveal more truthful information than anything else could, indicating that true feelings or intent are reflected clearly through eye contact. People with such nickname probably believe they are good at understanding others through their eyes.