Mumbler

mum·ble  (mmbl)

v. mum·bled, mum·bling, mum·bles

v.tr.

1. To utter indistinctly by lowering the voice or partially closing the mouth: mumbled an insincere apology.

2. To chew slowly or ineffectively without or as if without teeth.

v.intr.

1. To speak words indistinctly, as by lowering the voice or partially closing the mouth.

2. To chew food slowly or ineffectively, as if with the gums.

n.

A low indistinct sound or utterance.

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[Middle English momelen, from Middle Dutch mommelen.]

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mumbler n.

mumbly adj.

Thesaurus

Noun

1.

mumbler - a person who speaks softly and indistinctly murmurer, mutterer speaker, talker, verbaliser, verbalizer, utterer - someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous); "the speaker at commencement"; "an utterer of useful maxims"