The term 'Lil Bro' evolved from African American Vernacular English (AAVE) to become one of the most prevalent insults and nicknames in modern internet culture. It is primarily used to patronize or belittle someone, implying they are younger, smaller, or less significant than they believe themselves to be. The slang gained massive traction on platforms like TikTok and Twitter, where users comment 'Lil bro thinks he's [X]' to mock someone exhibiting unearned confidence or failing at a task. While it can be used affectionately between friends, its meme status usually centers on the comedic juxtaposition of someone trying to act tough while being dismissed with a simple, 'okay lil bro.'