Webster's Revised Unabridged Dictionary · 1913

Glib

Glib (glib) , adjective

[Probably from Dutch glibberen, glippen, to slide, glibberig, glipperig, glib, slippery.]

1.
Smooth; slippery; as, ice is glib. [Obsolete]
2.
Speaking or spoken smoothly and with flippant rapidity; fluent; voluble; as, a glib tongue; a glib speech.
I want that glib and oily art, To speak and purpose not. — Shakespeare

Glib , transitive verb

To make glib. [Obsolete] — Bp. Hall

Glib , noun

[Ir. & Gael. glib a lock of hair.]

A thick lock of hair, hanging over the eyes. [Obsolete]
The Irish have, from the Scythians, mantles and long glibs, which is a thick curied bush of hair hanging down over their eyes, and monstrously disguising them. — Spenser
Their wild costume of the glib and mantle. — Southey

Glib , transitive verb

[Compare O. & Prov. English lib to castrate, geld, Prov. Danish live, LG. & OD. lubben.]

To castrate; to geld; to emasculate. [Obsolete] — Shakespeare