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7.
Electric lamp consisting of a glass bulb containing a wire filament (usually tungsten) that emits light when heated.
Geek One: What do you do in your free time?

Geek Two: Change lightbulbs!
by IrishRepublicanArmy January 27, 2004
52 48
 
1.
Word used to describe an inbred child that has a massive forehead.
That Drew kid is so creepy with his massive forehead.
It looks like a 'lightbulb'.
by Drew is an inbred child November 08, 2010
158 19
 
2.
To be a "third wheel" in a situation where only a couple should be together. Think of the single lightbulb in an interrogation room.
I wish Monica wouldn't be such a damn lightbulb... I want some quality time with my boo.
by Ayu September 26, 2004
139 55
 
3.
that thing that goes over your head when you have an idea
*light bulb goes over your head* I HAVE AN IDEA
by idontplaywithpencils May 16, 2005
87 37
 
4.
A breakdancing palm tree from the Hagaren fandom.
Q: How many Hagaren fangirls does it take to screw in a lightbulb?
A:....
Fangirls: OMFG WHAT IF ENVY *IS* THE LIGHTBULB!?!?!?
by wiremess March 04, 2005
137 92
 
5.
A glass thing that lights up. Thomas Edison created it. In some comics/cartoons when a person gets an idea a light bulb pops above their head.
A light bulb makes light.
by Freya-Chan April 01, 2010
16 6
 
6.
A light source which can be considered fun to look at while high
"wow look at that lightbulbs" says christian

"Its like the blood in my arms" says john the emo
by Chrsitain Baker December 24, 2005
10 5