Greenbeard altruism is a fascinating concept in evolutionary biology that attempts to explain the evolution of altruistic behavior. It proposes that a single gene (or a set of tightly linked genes) can be responsible for three distinct traits: a noticeable signal or "tag" (like a green beard), recognition of that signal in others, and altruistic behavior directed towards those with the same signal. This allows individuals to selectively cooperate with others who share the same gene, even if they are not related. 1 While the "green beard" example is hypothetical, there are real-world examples of this phenomenon in various organisms, highlighting the potential for cooperation to arise through mechanisms beyond kin selection.
Green beard altruism, while theoretically possible, is rarely observed in nature due to the complex requirements of a single gene controlling the signal, recognition, and altruistic behavior.
by The Counterintuitive Words February 10, 2025
A specific sub-mentality commonly preached by the Bearded Blevins Bearded gang. This mentality is one sought after, developed, and fostered through countless trials and hardships. It can only be attained by the few. Traits commonly seen in individuals with the Bearded Mentality includes, but is not limited to: a passion for bourbon, performing great feats of escape, 360 no scope sniper kills, beards, and the ability to smoke meats to perfection.
by OfficialJD July 21, 2022
When a girl is sucking your dick, and just before you cum, you jam her head down on your cock and shit, then it flows onto her chin and she has a Cambodian beard.
by JoeblowLids September 09, 2017
Where a person goes when they are high on marijuana. The equivalent of Margaritaville for those who drink.
by Colleen Barbie March 31, 2008
Ben grabbed his beard briefly when he has the bearded guy sitting at the cafe table. The guy returned the beard greeting by taking hold of his own.
by CaptainSparkness August 03, 2014
Apparently they went home together, I knew they would though, she was gray-bearding him all night...
by Wisevalve November 05, 2010
When your missus decides to over shave your neck and your beard overtime conjoins with your hairline at the back of your head!!
by The crafty cutie March 24, 2019