FULSOMELY

unctuously, smarmily, fulsomely

(adverb) in an unctuous manner

Source: WordNet® 3.1

Etymology

Adverb

fulsomely (comparative more fulsomely, superlative most fulsomely)

In a fulsome manner

Source: Wiktionary

FULSOME

Ful"some, a. Etym: [Full, a. + -some.]

1. Full; abundant; plenteous; not shriveled. [Obs.] His lean, pale, hoar, and withered corpse grew fulsome, fair, and fresh. Golding.

2. Offending or disgusting by overfullness, excess, or grossness; cloying; gross; nauseous; esp., offensive from excess of praise; as, fulsome flattery. And lest the fulsome artifice should fail Themselves will hide its coarseness with a veil. Cowper.

3. Lustful; wanton; obscene; also, tending to obscenity. [Obs.] "Fulsome ewes." Shak.

– Ful"some*ly, adv.

– Ful"some*ness, n. Dryden.

Source: Webster’s Unabridged Dictionary 1913 Edition