en-verb|inf=to geek out|geeks out|geeking out|geeked out
- To enthuse about a narrow topic, not realizing that most people listening will not understand a bit of it.
#: Sorry, I didn't mean to spend fifteen minutes discussing the definition of decimate. I guess I geeked out for a bit.
- To do geeky things; to act geeky; to speak of geeky things.
#: Hey guys, let's geek out tonight and have a code-a-thon!