cottonmouth

[kot-n-mouth] /ˈkɒt nˌmaʊθ/
noun, plural cottonmouths
[kot-n-mouths, -mouth z] /ˈkɒt nˌmaʊθs, -ˌmaʊðz/ (Show IPA)
1.
a venomous snake, Agkistrodon (Ancistrodon) piscivorus, of swamps in southeastern U.S., that grows to about 4 feet (1.2 meters).
Also called water moccasin.
Origin
1825-35, Americanism; cotton + mouth, so called from the whiteness of its lips and mouth
British Dictionary definitions for cotton mouth

cottonmouth

/ˈkɒtənˌmaʊθ/
noun
1.
another name for the water moccasin
Slang definitions & phrases for cotton mouth

cotton mouth

noun phrase

Dryness of the mouth caused by a hangover, use of marijuana or drugs, fear, etc (1970+)