笑从双眼生
[xiào cóng shuāng yăn shēng]
'Xiaocong Shuangyan Sheng' means 'Smile originates from both eyes' which implies the laughter comes naturally and sincerely, showing a carefree and joyful spirit or attitude towards life of the nickname owner, suggesting that this person can easily express his or her positive emotions through facial expressions, especially eyes that are considered as the windows of souls.