Yo, if you’re too lazy to make the effort, just cba and look it up on Urban Dictionary, fam. It stands for ‘can’t be arsed,’ like when you’re not bothered to do something. We’ve all been there, so no judgement, just a way of life.
Example: Girl: ‘Wanna go out tonight?’ Guy: ‘Nah, cba, just wanna chill at home.’