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The Negative Sideburn (also known as "negburn") is achieved when one elects to shave their sideburns above the ear line.

Although various execution methods exist, negburns are best visualized by imagining someone putting on a pair of glasses, then lopping off all hair beneath the ear piece.
The fat slob playing slow-pitch softball has a mean pair of negburns.
by joesportsfan January 19, 2011