beslobber
To wet, besmear, or befoul with spittle or anything running from the mouth; cover in slobber; bespawl.
transitive
For one moment I had a vision of a horrible mask like a giant toad's, of a warty, leprous skin, and of a loose mouth all beslobbered with fresh blood.
To slobber over with effusive kisses; praise or flatter fulsomely or in a fulsome manner.
transitive
The salaried Viceroy of France […] beslobbering his brother and his courtiers in a fit of maudlin affection.
1828, Thomas Babington Macaulay, essay?
Where it comes from
From Middle English besloberen, equivalent to be- + slobber. Compare beslabber.
Adapted from the Wiktionary entry beslobber (CC BY-SA 4.0).