1 definition by jwrs50

Top Definition
A thick layer of white substance that covers most of your tongue if you're a long-term marijuana user. Causes reduced effectiveness of tastebuds and poor oral hygiene.
"Your tongues's rottin' out from cottonmouth, when you're so dependent on weed you end up spendin' a G in the vending machine."

Been smoking for too long, really bad cottonmouth.
by jwrs50 October 24, 2011
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.