mumbler's Usage Examples:

from Pskov, it is thought that he was nicknamed "Barma" (Барма) ("the mumbler"), although it might be that his full name was, in fact, Ivan Yakovlevich.

array of hooks with enough eccentricity to make Morrissey sound like a shy mumbler.

of other Eastern European bagpipes) is the "flea-hole" (also known as a mumbler or voicer, marmorka) which is covered by the index finger of the left hand.

Time! People love it! People hate it! At the same! Damn! Time! He's a mumbler! He's a shouter! At the same! Damn! Time! What a genius! What a doofus.

He's a low-charisma mumbler who tends to keep his characters' emotions bottled up, making him the rare.

mumbler.

Synonyms:

mutterer; verbalizer; speaker; utterer; murmurer; verbaliser; talker;