Top definition
A grace day for handing in a homework late so that the grade will not be penalized.
My report is a day late but it's okay because I have three slip-days in this class this semester.
by Strideo February 15, 2008
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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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