brewin
to express multiple emotions and acts anger/joy/to gossip/to have fun etc. (to brew).
Given the situation and the emotions involved you could use brew/ brewin in all situations.

i like to say i'm brewing for you if i'm brewin for you

or
You brewin for me? - Y'all talkin shit?? also a favorite
"i'm brewin for you" could be negative or positive

"You brewin for me?" given a smile or a frown it's positive or negative
"Stop being a brewin bitch" -"if they're brewing for you they're a brewing bitch.
"what a brew" - given the situation it could be positive or negative
"I'm brewin"- "i'm having a good time, i'm upset, i'm bored af, i'm high".

"brewwwww" - for when your're really brewing something ( anger, distrust, pettiness etc.)
" oh brew" - for when someone is telling you gossip and its like saying oh shit
"brewin 4 you" - the ultimate brew you could brew could be a fighting statement
"i'm brewin up a somethin for you"- someone must be onto you or pissed at you or they have gossip to put you onto or maybe a gift or surprise.