look up any word, like fleek:
 
1.
Laughing uncontrollably and in an obnoxious matter for no reason.. or for a reason that is pretty random. Person has been using drugs and is high.
Doug: "Dude check out that book on the table"
Scott: "hahahaha! dude! hahahahaha!"
Doug: "man, stop geeking out.."
by scott April 18, 2004
 
2.
To spend an ammount of time discussing geekish things with other geeks, or to participate in geeky undertakings and pasttimes with one or more other geeks.
Geek 1: Wow.. how long have we been talking about World of Darkness?
Geek 2: Hm.. seems we've been geeking out for about three hours now
by Atrian October 19, 2006
 
3.
freaking out over something that could be considered nerdy/geeky and knowing it
I got the lab results back and my thesis was right! I was totally geeking out!

I found a book written in 1813 at work today and it made me completely geek out!
by krista91 July 09, 2009
 
4.
-verb

1. when a geek is captivated by anything geeky, for

example their computer, causing them to totally

disregard the time and the people around them.

2. common reason why a geek is "running late" to an

event or even work.

3. a way for a geek to express their true geekiness

without inflicting boredom on their loved ones
Girlfriend: "Hey honey guess what? Blah blah blah blah blah...."

Boyfriend: no response

Girlfriend: "HELLO!!!! Did you hear what I said!!"

Boyfriend "Oh sorry babe I had my head phones on 'cause I was totally geeking out. Wanna see my new drake?"
by greencat February 05, 2010
 
5.
Laughing, abnormally and uncontrollably, due to the consumption of Marijuana.
Laughter is often accompanied by tears and occurs, most often, in the early stages of one's relationship with Marijuana - with instances becoming fewer with (smoking) experience.
Often while geeking out, one's abdominal muscles will begin to cramp and his friends will either try to prolong the geek session by being randomly funny or become extremely annoyed.
Pud: Are you guys going to be smoking Marijuana all night?
Rouw: Yeah man, this is some good shit.
Mule: Hell yeah... I need to squat down. I just ate that half-pound ben's burger in 36 seconds.
Snood: hahahahaaha!!!!! hahahahahaha!!!!
Rouw: Damn, snood's geeking out! Stop geeking snood!
by Sam R. - 1998 May 16, 2008
 
6.
The act of doing something exceptionally geeky. Especially in the case of something that requires prolonged planning or preparation.
College student1: Hey where's Chuck?
College Student2: dude... he's totally geeking out today at some Star Trek convention or something today.
by Alex January 21, 2004
 
7.
the act of being forced to laugh uncontrollably, or the crazy noises one makes while laughing and high on marijuana or crack and having their feet tickled; the state of being that hyper-sensitive while the threat of being tickled exists-- gasping, snorting, chortling, struggling, so as to cause a raging erection on a male or a severe sexual desire in a woman.
The night I was smoking she decided to tickle my bare feet and I totally was geeking out!!!
by damn_u February 10, 2008