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slang To express excitement and enthusiasm about one's very specific and sometimes unpopular interest, especially by talking about it in great detail. My dad is a musician, so he totally geeked out during our trip to the Martin Guitar Factory. I completely geeked out when I realized I was looking at a sandhill crane—they're just so rare in this region! A: "Can I just geek out for a minute about how gorgeous Nicky Hopkins's piano playing is on this song?" B: "I don't know who that is, but sure?"
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
in. to study hard. (see also geek.) Big test tomorrow. I’ve got to get home and geek out.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.