Person who acts foolish, dumb, imbecilic to play off as innocent and get away with petty crime and lies.

Comes from the word doughnut. One who is ‘dumb’ might say the word ‘duffnut’ instead hence where the term comes from.
Friend: dude where did all the Doritos go? (Has red Dorito laced fingers)
Me: you duffnut! you know exactly where they went..
by Jimji March 25, 2019
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