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before embarking on any important task or activity a chant of DFIU (pronounced dee phi you) would usually be heard among participants
by a_girl_called_toby April 19, 2009
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2
ok guys, NASA needs this part to be Top secret with no Flaws, DFIU
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3
I'm giving you this task DFIU
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The vengeful act of crapping on a lover's chest while they sleep.

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