"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!