BAOF
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
Person 2: I know. They are total BAOFs. They would probably die if they are separated for more than 5 minutes