Definition of mushmouthed in English:

mushmouthed

adjective

US
slang
  • Of speech: indistinct, imprecise, sloppy. Of a person: having a drawling or indistinct accent.

Origin

1930s; earliest use found in Erskine Caldwell (1903–1987). From mush + mouthed, after mushmouth.

Pronunciation

mushmouthed

/ˌmʌʃˈmaʊðd/