The patch of hair grown right under the lip. Any self-respecting stylish male has one.

Varies from the common soul patch in that instead of simply being a nondescript, unshaped patch, the soul bar is a carefully trimmed horizontal line composed of meticulously taken care of bristle extending directly below the lower lip.
Kid 1- Yo kid, look at Neesh Dawg flirt up them ladies. How does he do it?!

Kid 2-IT'S THE SOUL BARRR.
by TheBossLord March 18, 2009
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