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Invite of Duty. Somebody you dont want to invite to a party but whom you know you have to as a matter of duty.
Jane - Who's that ugly kid dancing on the table?

Dan - Oh, ignore him, he's an I.O.D

Jane - Ew gross
by TCP2315 November 21, 2010
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gang in valdez, AK. off of the crips from compton. bitch
yo dis gang from da AK <IOD> is crazy man,
by willy billy bob August 19, 2007
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