Having a ready flow of words but lacking thought or understanding; superficial; shallow.
(dated) Smooth or slippery.
a sheet of glib ice
Artfully persuasive but insincere in nature; smooth-talking, honey-tongued, silver-tongued.
a glib tongue; a glib speech
Snarky or unserious in a disrespectful way.
verb
(transitive) To make smooth or slippery.
1628, Joseph Hal, “Christian Liberty Laid Forth,” in The Works of the Right Reverend Father in God, Joseph Hall, D.D., Volume V, London: Williams & Smith, 1808, p. 366, https://books.google.ca/books?id=8iUBAAAAQAAJ&printsec=frontcover#v=onepage&q&f=false
There is a drunken liberty of the Tongue; which, being once glibbed with intoxicating liquor, runs wild through heaven and earth; and spares neither him that is God above, nor those which are called gods on earth.
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.