A popular, successful, but highly independent and self-reliant person. Typically a male.
One step above an alpha male.
Unlike the simps of twitch, David was a sigma male as evidenced by his work ethic and the women throwing themselves at him.
by ImARaptors July 16, 2021
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Member of Phi Beta Sigma Fraternity Incorporated. Founded January 9, 1914 on the campus of Howard University in Washington, DC by the most honorable A.Langston Taylor, Charles I.Brown, and Leonard F. Morse. The sum of all and represents true brotherhood, scholarship, and service.
Every man wants to be a SIGMA man.
by Bro. Chapman May 10, 2008
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Sigma is a client for Minecraft which has the worst bypasses that don't even work. It gets you watchdog banned in milliseconds and the developer Omikron is known for scamming kids who think Sigma is a good client.
PersonA: Did you hear Sigma got a new bypass?
PersonB: It's not gonna work Omikron doesn't put time into the client.
by NotATriangle December 16, 2019
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As said above, a bald Maverick that won't fucking die! Except in X8 where he's gone for good. At least so says Capcom. But they lie too much and give me gas.
Sigma: JUSDIEECKS!!!11 JUSDIEEE!!!!111

X: WTF mate?
by AD2101 January 10, 2005
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A sigma is a b.i.t.c.h no not a "bitch" but a beautiful intelligent talented cute little human. Anyone would love to be around a sigma! Her charm and optimism is irresistible. Some might even say once you've been around a sigma you can never go back! However if you ever get on the bad side of a sigma, kill yourself before you get some of her attitude.
"That girl is such a sigma, i never want to leave her!"

"Yeah she's a sigma alright, don't get her mad"
by sweetooth345 August 21, 2011
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some guy who has a small penis and makes a living mowing lawns.
guy 1: man the grass on my lawn is so long

guy 2: just call sigma. he'll mow it.

guy1: good idea! i will.
by the guy with the hat June 26, 2009
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