What must I do

you should talk with her and tell her to help also^^ she should help in house chores. me and my sisters always help my mum doing that. and we work also. so if your sister doesnt work at least she should help in house chores. talk with her and im sure that she will understand it. dont worry deni :) just talk with her and im sure she will listen to you. you are her brother and she knows that we all should help at home.

Kick her out to get a job or look for some other place to live.

you need to do, do not have anyone doing the work associated with him. Like washing his clothes, clean his room, or work concerned with himself. Every person has a lazy nature, but at the moment no one can do his job, he would be forced to do it themselves.

I was like that before.. My Dad disciplined me.. I usually asks for things I like. That's what he used against me. He said; until I did some household chores, then he will give me what I want. So I did.. As years passed by, I've learned to do household chores with no conditions.. I love doing things and I hate doing nothing now!! Hope this kind of discipline helps you with the problem with your sister!!

well, i don't know how old your sister is, maybe she indeed should do some chores at home,sometimes,if she is old enough, you can try to communicate with she and make she realize that a lazy girl is not welcome the human in society, and she must learn to take care of herself life, to be a diligent person, after all, for a lazy person, she will get fewer opportunities to success than others...

Offer to help her. I have 3 sisters and they most often don't want to do work or won't do it if they are alone. Whatever she's doing, let her know that she's going to take less time doing it than complaining and help her do it.

You can tell your parents about it... O you can force her, but I doubt that'll work. You can just let her be, until her room becomes so messy she'll have to clean it out..or you can give punishments, like no tv, no cell phones or internet if she doesn't clean. How old is she anyway?

Its not up to you to do make her do work or get moving. If she wants to waste her life then let her its her choice.