adjective
Having a ready flow of words but lacking thought or understanding; superficial; shallow.
(dated) Smooth or slippery.
Artfully persuasive but insincere in nature; smooth-talking, honey-tongued, silver-tongued.
Snarky or unserious in a disrespectful way.
verb
(transitive) To make smooth or slippery.
noun
(UK, slang, obsolete) A person's mouth or tongue.
noun
(historical) A mass of matted hair worn down over the eyes, formerly common in Ireland.
verb
(obsolete) To castrate; to geld; to emasculate.