The hair that grows on the back of your neck. Usually comes is two strips - one for each side of your neck.
Dude look at your freakin neck! Your Glennons are thick. Get em cut!
by Someone who has done this same thing October 13, 2006
1. The act of royally screwing something up, usually followed by being a cry baby and looking like a pothead.
"He pulled a Glennon!"
by HokieFootballFan September 15, 2007