Some know “sigma” as the 18th letter of the Greek alphabet but it’s also teen slang for a cool dude. According to Know Your Meme, sigma is “referring to a supposed classification for men who are ...

Are "skibidi," "rizz" and "sigma" out? It's back-to-school season, and students are not just bringing home stomach bugs; they are also saying new words and phrases that may make no sense to anyone out ...