Mum″ble (?), v. t. [imp. & p. p.Mumbled (?); p. pr. & vb. n.Mumbling (?).] [OE. momelen; cf. D. mompelen, mommelen, G. mummelen, Sw. mumla, Dan. mumle. Cf. Mum, a., Mumm, Mump, v.] 1. 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.
Peace, you mumbling fool. Shak.
A wrinkled hag, with age grown double,
Picking dry sticks, and mumbling to herself. Otway.
2. To chew something gently with closed lips.