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When you have a sand timer for something and at the very end you slam on the top so 0.00036% more sand comes out for the next millisecond. Eventually adds up to about 4.5 seconds out of your life that you didn't spend.
My little brother was brushing his teeth and when he looked away I slammed the pussy's time so when he tells anyone he brushes for 2 minutes I can correct him 'cause of The Lost Grain.
by Ass Kicka September 26, 2010
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