Dictionary
mo•tor-mouth
Pronunciation: (mō'tur-mouth"), [key]—
n.,
—pl. -mouthsPronunciation: (-mouths", mou&thslash;z"). [key]
Slang.
a person who is a constant or irrepressible talker.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.