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best and only friend. beyond the realm of BFF because this BAOF is literally the only person the other hangs out with.
Person 1: Do you know Lexi and Claire? They are like attached at the hip. They do EVERYTHING together.

Person 2: I know. They are total BAOFs. They would probably die if they are separated for more than 5 minutes
by the best and only friend June 09, 2010
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