Best definition
Xi is a beautiful young lady. she has short black hair and has black eyes. She is smart and is

always positive but really sarcastic and is always making jokes about the things you say ( but not in a bad way). She can also unintentionally make sexual jokes:)

Person 1: Wow that girl is always smiling

Person 2: Yea, she’s such a Xiyuan

Person 3: ooooo damn girl what a xiyuan