1 definition by WHSOfficer_TSizzle

A successful, but highly independent person, typically a male, who goes largely unrecognized for their accomplishments.

One step above an alpha male.
Call me crazy, but Grady is an underrated sigma, he does so well in his classes and with the ladies, but gets almost no recognition for it.
by WHSOfficer_TSizzle December 20, 2022
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