Top Definition
A tweaker who has done to much meth and is mentally "out-there".
"Man what a shard tard. He thinks there's really people in the walls."
"You're acting like a real shard tard."
by krazzekiki June 26, 2006

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.

×