mushmouth

or mush-mouth

[ muhsh-mouth, moo sh- ]
/ ˈmʌʃˌmaʊθ, ˈmʊʃ- /

noun, plural mush·mouths [muhsh-mouths, -mouth z, moo sh-] /ˈmʌʃˌmaʊθs, -ˌmaʊðz, ˈmʊʃ-/. Slang.

a person who speaks indistinctly.

Origin of mushmouth

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019