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Used to signify foolishness/disapproval of ones action.

Spoken as "day" but with a slightly pro-longed ending, in a deep 'retarded' sounding accent.
Tom: I can't come out

Dec: Deyy


Tom: I walked passed him

Dec: Past*

Tom: Ah fuck.

Dec: Deyy
by TrueQuiche November 02, 2009
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