You're So Glib

I was watching an episode of Dawson's Creek, and Joey (Katie Holmes) calls her college tour guide glib. The episode aired in 1999.

Fast forward to June 2005. Tom Cruise (Katie Holmes' then-fiance, now-husband) gets into an argument with Matt Lauer, and calls him glib.

I think those are the only two times I've ever heard the word used.