Sigma 

While it previously meant "an adult male who was particularly cool and followed the right way of life" (according to the ones who made up the word, that is), this word became nothing more than brainrot word filler. When spoken today, the word usually has no actual coherent meaning behind it (similiarly to the word skibidi, which is also a meaningless word). The only reason you would say this is either as a joke or because the word is catchy

...Also it's the 18th letter of the Greek Alphabet.

A kid singing to himself: "sigma boy, sigma boy, sigma sigma boy boy..."

Sigma by Gaia the knight September 18, 2025

Sigma

A person who is self dependent, self sufficient , confident and has a bloody sharp jawline.

Billy said to him - Blud's a Sigma

Sigma by Arnq October 24, 2025

Sigma

Modern slang which means that a person is cool/has aura (is cool)

My guy is so sigma

Sigma by PuhuhUHHHH February 16, 2026

Sigma

Sigma boy

Sigma

Sigma by AndersonBaird67 March 13, 2026

“Sigma” 

A “sigma” person is a person who is usually racist, misogynistic and can’t stand the lgbt or furry community, usually by making fun and or generally bullying a member of a certain community, and then having others justify their actions by calling them a “sigma”, not to be confused with actual sigma individuals that actually have respect for peoples feelings.

(Not a rant post)

Person 1: “go kys furry, you probably touch animals”

Person 2: “bro you are so “sigma” !”

“Sigma” by Potatoboye June 6, 2023

Sigma Hater 

One who possesses a disproportionate disdain for single bonds. Known colloquially as "pi snobs," these individuals are predisposed to looking down on saturated molecules.

Freddy said he wouldn't go near that 3-methyl octane, but he can't keep his hands off my heptadiene. Man what a sigma hater!

Sigma Hater by Big Diggity January 6, 2015

sigma male 

A more internally-focused sibling to the alpha male. While the alpha male quantifies himself on his high position in the social hierarchy, a sigma male prefers to forego the social hierarchy and need for external validation altogether and pursue internal strength instead. Essentially a "loner" or a stray man, although sigma males may have a close circle of friends and loved ones with whom they share a deep connection. The sigma male is not socially inept but simply socially disinterested. Prefers solitary activities where he doesn't have to play social politics and can simply focus on himself. The sigma male accepts that he does not need power over others as the alpha male desires, but rather needs only power to control himself and preserve his own autonomy from others. Sigma males are often pragmatic but may be seen by others as aloof, paranoid, secretive or selfish.

Not to be confused with simply being an unlikeable asshole, edgelord, or misfit.

John: Hey, who's that over there on a table by himself?
Mary: Oh, that's Patrick. He's a bit of a sigma male.

sigma male by UDUser4820 January 11, 2022