O misery, misery, mumble and moan!Someone invented the telephone,And interrupted a nation's slumbers,Ringing wrong but similar numbers.
— Ogden Nash

When in charge ponder. When in trouble delegate. When in doubt mumble.
Unknown mumble quote

I'm not Jack Nicholson. I'm not Brando. But I do mumble.
— Benicio Del Toro

I like to mumble when I act, 'cause I think it's more realistic. For some reason, the impediment has given me the accent of a Mexican gangster.
— David Arquette

When in doubt, mumble; when in trouble, delegate; when in charge, ponder.
— James H. Boren