the worst excuse for a word. it does NOT mean before anyone else. it just means "i'm trying to be cool and failing at it so i'm gonna use a word of ethnic origin".
bae is the English way of saying bacon and eggs really quickly, so when your rushing to work and want a bacon and egg muffin from McDonalds you can ask them for a bae muffin and they will know eggsactly what you mean.
Mum can I have some bae? (Mum can I have some Bacon and Eggs?)
bae, I love you! (Bacon and Eggs, I love you!)
I miss my bae. (I miss my Bacon and Eggs)
Bob, my bae. (Bob, my Bacon and Eggs)