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1.
A nonsensical word first used by Professer Frink. Used to describe any emotion from surprise to joy to sadness.
Great glayvin in a Glad Bag!
by JoeBob August 15, 2003
 
2.
A nerd; a comment or action that is nerdy
He's a definite glayvin.

What a glayvin.
by Joe June 02, 2004