不是你的就别碰
[bù shì nĭ de jiù bié pèng]
Translated to 'Don't Touch If It's Not Yours', this username indicates a possessive nature towards things or individuals who belong specifically to them. There could be various implications such as emphasizing personal space and possessions, advocating for the importance of not crossing boundaries, respecting others' belongings, or conveying possessiveness in a relationship context.