Cotton mouth

[Mark Zuckerberg]

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.

[Sonia]

when you smoke pot and your mouth gets dry

[PussyCat]

When you get a very dry mouth probably from smoking any number of items or not drinking anything in ages.

[Justin Bieber]

xerostomia, dryness of the mouth