Top Definition
A word that is used to describe a very nerdy/geeky person or action. It can also be said as an exclamatory remark to highlight and make fun of someone's geekiness. This word originates from the noise that Professor Frink (from The Simpson's) frequently makes when he is excited about some scholarly invention or notion.
ex1) Lisa: Guess what? I just organized all my biochem notes from last semester on color coded flashcards.
Amanda: Wow, you are such a McGlyvin.

ex2) Tara: I missed the new episode of Star Trek because I was having an LOTR extended trilogy party with some of my friends from computer engineering.
Lisa: MCGLYVIN!
by Lisa Z May 20, 2005

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