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A never resting bald headed maverick that keeps coming back when you kill him
"So its you sigma....i knew you'd come back for the 600th time!"
by Uber-Chris May 11, 2003
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Jul 15 Word of the Day
The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.
Billionaires are having a dick swinging space race while the earth experiences record breaking heatwaves that cause sea creatures to literally cook inside their shells. We need planetary quarantine.
by monkeylabor July 14, 2021
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2
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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3
Orginally an east coast based secret society, it is now rumored to exist all over the country. Selection is deemed to be the most vigorous of all secret membership clubs and are recruitment is based at most of the major top tier universities.

Very well known for sketchy dealings, members of this society are notorious for bending the political climate to their liking.

i wish i was asked to join the sigma s, i hear they have 0% interest loans.
by jake t February 03, 2007
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4
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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5
a pistol made by smith and wesson just like a glock but less expensive and more reliable
fuck your glock i gotta a sigma
by wardendodger December 22, 2008
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6
An East Coast based Secret Society. Members identities are not revealed and goals of the Sigma S remain unclear. Membership is deemed to be the most selective of all major clubs in the USA. Application is by invite only and selection is rumored to be less that 15%.
I heard the Governor of Virginia is a Sigma S member.
by Martin Heffner October 22, 2006
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