"Cottonmouth" is a mental condition from smoking weed. At a low to mid level high cotton mouth will occur when the mind is being offset by T.H.C. Your mouth is actually wet and you are still salivating, it is just a mind game. At a high level of "highness"(blown), cottonmouth can occur and can lead to dehydration.
dude i have "cottonmouth". dude its your mind playing tricks on you!
Cotton mouth is not only a very dry mouth from smoking pot, but involves having small bits of mucus and spit, lining mainly the roof of your mouth feeling like cotton when you rub your tounge against it.