Expression I learned recently - I can't be bothered to do anything

Recently I totally changed my attitude about studying English. So far, I have just studied English to have a good score to enter a good university or to have a nice job. It's sometimes so stressful and frustrating. However, I changed my mind to enjoy language itself as a communication tool with foreign friends and to understand other cultures. I'm really into the English expressions. And I would like to adapt it to communicate with friends.

Yesterday, I learned this expression " I can't be bothered to do anything"
When I don't feel like doing someting, I will use this expression to my friends.

A : Do you want to watch a movie tonight?
B : Sorry, I can't be bothered to watch a movie.

No matter what language you guys hope to learn, just enjoy language itself. :)