Although it can be used as a term of endearment toward loved ones, an alternative meaning or use would be a a term you call someone to show your appreciation for what that person did or has, to the extent that it becomes an attribute you would desire in a loved one.
Person 1: I did all my homework, with no procrastination.
Person 2: That's so bae of you.
Person 1: I wrote the notes for you so you don't have to catch up.
Person 2: Such a bae.
Person 1: Oh my gosh! I got the new tongue piercing that I've always wanted.
Person 2: That looks so good. That is so bae.
Bae is an acronym for "before anyone else".
It is used by someone to address their girlfriend, boyfriend, or spouse.
"She's my bae."
"He's my bae."
before anyone else or bitch always eating
"girl you is bae" " does bae stand for bitch always eating cause if so yes I am bae"