HyperDic

English > 1 sense of the word motormouth:
NOUNperson motormouthsomeone who talks incessantly
English > motormouth: 1 sense > noun 1, person
Meaningsomeone who talks incessantly.
Example"I wish that motormouth would shut up"
Broaderspeaker, talker, utterer, verbalizer, verbalisersomeone who expresses in language