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3.
a number that is impossible, because it cannot be reached, like eleventy eleven or anything like that.
the world will end using this number, someobody will try to write "eleventy-twelve and will blow up the world.
by the creeper down the street January 12, 2011
 
1.
A fictional number (not imaginary) that one uses when they need a random number.
Guy #1: If 5x + 12 = 11 + 6, what is x?

Guy #2: Uhh... ELEVENTY-TWELVE!
by Joshamuffin May 31, 2007
 
2.
A large, large number. Twenty-three zeroes ( 11 + 12 ). Unable to be obtained.
Dude, they're beating us by like eleventy-twelve.
by ToniBurrito June 11, 2007