Top Definition
A man who wants to be funny, but just can't at a certain moment in time. Ultimately leading to Non not laughing during class.
"I want to make you laugh, but i'm a Mcsillyster :("
by Winkwinkmcgee May 06, 2010

Free Daily Email

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

Emails are sent from We'll never spam you.