A dull crayon is most obviously a crayon which is dull. This word can also be used as an insult because just like nobody likes a dull crayon, nobody likes the person called a dull crayon.
Don't talk to him, Collin is a dull crayon.
by definerofworlds June 20, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×