look up any word, like fleek:
A state of mind in an office/work environment where a person guards their pens as if they were gold. The pen crazy person often snaps or gets the shakes if someone uses one of their pens with or without permission.
Pam: Anyone got a pen I can borrow?
Cindy: Here's one. Keep it.
Pam: Are you nuts?!?! That's Kelli's pen! If she knew I took her pen, she'd kill me! She's pen crazy!
by Superood September 24, 2010