'尖子' literally combines '尖' (jiān), meaning 'sharp point' or 'tip', and '子' (zi), a common noun suffix. Figuratively, it refers to someone who stands at the very 'tip' — the top performer in a group, especially academically or professionally. It carries positive connotations of excellence, distinction, and leadership among peers.

The term is widely used in educational contexts (e.g., '年级尖子' — top students in a grade) and sometimes in workplaces or competitive fields like sports or arts. While respectful, it’s informal and not typically used as a self-reference; people usually say it about others ('他是班里的尖子') rather than calling themselves '尖子'. It implies consistent high achievement, not just one-time success.