Similar to Best Friends Forever (BFF), Best Enemies Forever (BEF) means two
people who love to
hate each other and rip on each other every chance they get. They are sworn enemies who form a bond of hatred so strong that it's more
like a perverse kind of friendship.
Bill: "Goddammit, I
hate that asshole
Craig! Who does he think he's trying to impress??"
Dan: "Dude, will you stop talking about
Craig? When did you two become BEF?"