What “Vex” means
Vex means angry or annoyed. You can be vex, get vex, or be vex wid someone. "Vex bad" means very angry.
Examples
Him vex bad
He is very angry.
Yuh vex wid mi?
Are you upset with me?
Mi sorry, nuh get vex
I'm sorry, don't be angry.
How to use it
Everyday and very common, from mild irritation to real anger.
Where usage varies
Jamaican speech helped carry "vex" into everyday London slang.