When an animal (most commonly a bird or reptile) inflates its neck area in an attempt to impress or intimidate.
That King Cobra is pissed, check out its neck boner!
by tamburlaine May 08, 2009
1 more definition
When you get hurt so bad, your spine can be seen in your neck
My friend crashed his car, the doctors said he had a Neck Boner
by NateTheHater April 12, 2014