An in-game recording of a video game, pretty much exclusively PC games. They are often taken of competitive matches in games like Counter-Strike and Call of Duty.

Demos can only be played back within the game, however they can often be exported into actual video clips for use in frag videos (or "montages").

Though time-consuming, many games allow you to do all sorts of things with demos; search YouTube for demo recording tutorials to learn more.
Crap, I forgot to record a demo of that game
by estrale November 3, 2010
Get the demo mug.
I was demoed while playing ns.
by Link March 13, 2005
Get the demoed mug.
Cross between Drunk and Emotional, usually happens at parties when people get drunk and end up spilling their feelings all over the floor
He was so demo I couldn't get away from him for hours
by Roxy April 18, 2005
Get the Demo mug.
a person, usually a female, used for sex, money, or other things by people (mostly dudes).
Ever since Heather played me, she's nothing but demo for weed and money.
by Brianna B. November 8, 2004
Get the demo mug.
The act of shitting in unusual places. (i.e. a lake, a pringles can, a purse, etc.)
by jesseeecaa August 6, 2005
Get the Demoe mug.
1) Nerd like; Bosexual
Demo is a fucking dem.
by Paul April 21, 2005
Get the Demo mug.