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the stuff that is left over when you erase something. (that gray matter that you have to brush off your paper)
Don't erase too much, I don't want URDOO all over my desk.
by cali June 13, 2004
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May 18 Word of the Day
When you think up something brilliantly righteous while baked.
X: I had this great highdea last night
Y: You clearly were philosopher stoned.
by TripleWest September 03, 2012
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