short for 'spazzy bitch face' used to descibe someone who is annoying and two faced. Used for online chat.
'she is such a sbf'
'y?'
'she was talking to me, acting like friends an tht, then she walked out the door and two seconds later i could her laughing to her other friends bout how much she hates me!'
'what a sbf'
Secret Best Friend. When u already have a best friend but there's another that you have some connection with and they're incredible and the person you're best friends with isn't your bff any more.
Cydney : you're my best friend. My sbf
Rayssa: Same, makaila is a bitch and plus I have a connection with you 💛