it means super bestest friends of all bestest friends. it means that these two people are better than you and their friendship pwns yours. your sbfoabf is the chapstick to your chapped lips and quite often are nose pickers. they are lovely people that although they fight, can still suck some major cock when they're together.
katelyn and aly are sbfoabf's and therefore pwn your ass.
af kaytuhlenn 15. april 2008