44 definitions by Shawn E.

short for HAL 9000, the killer computer from 2001: A Space Odyssey.
Some Dude: I'm gonna wrtie a better definition, HAL.
Me: I'm afraid I can't let you do that.
by Shawn E. June 24, 2003
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acronym for Mutual Assured Destruction, a theory that states that a nation wouldn't begin a nuclear war because the opposing nation would destroy them in retaliation.
MAD may very well have saved all our asses from a nuclear holocaust on several occasions.
by Shawn E. November 7, 2003
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