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The shortened form of "I don't know".
Pronounced as Ah - Da - No.
Used as a code-word for doing something that may be deemed inappropriate (such as smoking dope) by somone nearby who is not involved in the conversation.
Me: " Hey man, what are you doing tonight?"
You: " Adano "
Me: "Well, me and the guys are gonna be doing some Adano too, why not cruise by?"
by the Den of Iniquity December 06, 2006
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