driveller:
(also, in American English spelling — ‘driveler’; plural: ‘drivellers‘)
a person who talks carelessly and/or in a stupid or childish way; a jabberer;
a person or a child that dribbles or drools, i.e. a person who cannot control the flow of saliva coming/spilling out from the mouth; a drooler; a dribbler,

a driveller (R) annoying her mate (L) with her drivel
Most of the members at the club take Mr Johnson for a driveller for his senseless talk.
When a politician wins, he’s called ‘dynamic’ but when the same politician loses, he’s ridiculed as a ‘driveller’.
We know that it’s not safe to talk to our old professor standing close to him because he’s a driveller and the one close to him may be dripping with his spittle in minutes!
Mothers normally tie bibs to baby drivellers to keep their clothes dry from their dribble.
