small ego; limited self
A rare term likely used in philosophical or psychological discussions to contrast a narrow, individualistic sense of self with a broader, more universal perspective. Not in common everyday use.
That philosophy book argues that one should transcend the 'small ego' and reach the greater self.
Compound of 小 (small) and 主観 (subjectivity, ego). The exact origin is uncertain; it appears to be a coined term in philosophical or religious discourse, not a common word.