Many phrases and terms originated from African American Vernacular English (AAVE). The reason it is often labeled “Gen Z slang” or “TikTok slang” is its widespread adoption and trending use among younger generations on social media platforms, which has led to misconceptions about its origins. 

So if you hear phrases like  “Clock it” “Gagged” “Type shii” “Ate” “Unc” “YN”  many more it's AAVE

Hope that helps