Definitions for "Mumble "
Mumble is low-latency, high quality voice chat software primarily intended for use while gaming. It should compile and run the client out of the box on at least Ubuntu
Low-latency, high-quality voice communication for gamers. Includes game linking, so voice from other players comes from the direction of their characters, and has echo cancellation so the sound from your loudspeakers won't be audible to other players.
To speak with the lips partly closed, so as to render the sounds inarticulate and imperfect; to utter words in a grumbling indistinct manner, indicating discontent or displeasure; to mutter.
To chew something gently with closed lips.
To chew or bite gently, as one without teeth.
grind with the gums; chew without teeth and with great difficulty; "the old man had no teeth left and mumbled his food"