"drivel, slobber, drip saliva, as an infant does," 1802, drule, apparently a dialectal variant or contraction of drivel. Related: Drooled; drooling. The noun is from 1869.
Entries linking to drool
drivel v.
Old English dreflian "to slaver, slobber, run at the nose," from Proto-Germanic *drab-, perhaps from a PIE *dher- (1) "to make muddy, darken." Transferred meaning "to speak nonsense" is mid-14c., driveling being characteristic of children, idiots, and dotards. Related: Driveling, drivelling.