Definition of «unc behavior»

This term is used to mock someone who is acting older than they are or who is out of touch with modern youth culture. 'Unc' is short for uncle, and 'unc behavior' typically refers to using outdated slang, dressing like an older man, or giving unsolicited 'old head' advice. It is a lighthearted way for younger internet users to gatekeep contemporary trends from those they perceive as 'old'.