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5.
1] (noun) a person with little knowledge of a subject that another person greatly understands; 2] (adj.) undereducated, retarded, not knowledgeable in a subject; 3] (adj.) hard to understand, confusing, undecipherable (as used by John Cleese in Monty Python's Flying Circus, Ep. 5, "The Smuggler")
1] You don't understand quantum physics? My god, you're such a glib.

2] Matt, Matt, Matt, you don't even — you're glib. You don't even know what Ritalin is.

3] That come out a bit glib, didn't it?
by puzzleapumalmt December 31, 2008
 
1.
Showing little thought; marked by a lack of intellectual depth.
Matt. Matt, Matt, you don't even — you're glib. You don't even know what Ritalin is.
by Steve Proulx June 24, 2005
 
2.
What Tom Cruise called Matt Lauer when he was clearly off his meds during the whole TomKat thing.
Matt...Matt... you're glib.
by ~*Daisy*~ June 25, 2005
 
3.
Gifted with the ability to speak articulately and even charmingly on the spur of the moment, but there is a lack of accuracy or understanding. Slippery or slick in speech, cunningly persuasive.
He was a charming man, but there was a glib quality to the way that he spoke; something just did not seem genuine about him.
by Lorelili July 27, 2011
 
4.
Anyone who does not welcome the thoughts and beliefs of one of today's greatest minds- Thomas Cruise Mapother IV. These people are to be seen only "as" glib (adjective.)
Matt...you're glib. You don't know what Ritalin is.
by The Prophet Bz December 18, 2005
 
6.
One who does not know anything.

Other uses:

A derogatory term meaning idiot or moron. Mr. Kasal, adj, noun, anything you wish.
Peter you're glib!
"If you don't shut up ill run you over with the car!"
"Don't be so glib"
You're a glib.
glibby little asshole
by 12skatetaconeato34 March 11, 2008
 
7.
1. Easily performed; non-challantly taken care of.

2. Marked by ease and fluency of speech or writing that often suggests or stems from insincerity, superficiality, or deceitfulness.

3. (slang) Boring, unexciting, or old-hat.
He recited Hamlet in a glib fashion.

Sandra's glib demeanor is pretty off-putting.

The baseball game today was rather glib; I hope tomorrow's game against the Yankees is more fun.
by Kiko December 17, 2003