The Collaborative International Dictionary
Drivel \Driv"el\, v. i. [imp. & p. p. Driveledor Drivelled; p. pr. & vb. n. Driveling or Drivelling.] [Cf. OE. dravelen, drabelen, drevelen, drivelen, to slaver, and E. drabble. Cf. Drool.]
To slaver; to let spittle drop or flow from the mouth, like a child, idiot, or dotard.
[Perh. a different word: cf. Icel. drafa to talk thick.] To be weak or foolish; to dote; as, a driveling hero; driveling love.
--Shak. Dryden.
Wiktionary
n. Foolish talk. vb. (present participle of drivel English)
WordNet
See drivel
Usage examples of "drivelling".
You have not only the honor of being my steward, but the privilege of being the worst, most incompetent, drivelling snivelling jibbering jabbering idiot of a steward in France.
And now, if your words have the meaning I read into them, you are mooting precisely the same drivelling scheme.