greasy
Lice scuttled greasily through her hair.
High-fat food leers greasily from advertising hoardings and TV screens.
The greasily painted performance artists played drums, piano, and pipes.
The old man looked up from his roast lamb and grinned greasily at them.

greasilyadverb (UNPLEASANTLY)

in an unpleasant way that makes you feel uncomfortable:
The newspaper commented greasily about her sexual status.
It is hard to ignore the greasily preachy tone.
Synonym