Noun
abnormal dryness of the mouth resulting from decreased secretion of saliva
Source: WordNetThe sound of a jet, an engine warming up, even the clopping of shod hooves on pavement brings on the ancient shudder, the dry mouth and vacant eye, the hot palms and the churn of stomach high up under the rib cage. John Steinbeck
Dry mouth, or cottonmouth, is the most common side effect of smoking cannabis. Source: Internet