turn sb off
It turns me off when he uses my computer without asking me.
B:Hi,Steven.what's new with you?
A:Not too much.I'm looking to rent an apartment.
A:I dislike my roommate.He really turns me off.
B:What happened?Did you have a fight?
A:No.He likes to leave his things about and never cleans the room.
B:I hate that,either.Did you tell him your feelings?
A:Yes,but he doesn't care.I really don't want to move,but I simply can't stand him.
B:It's a problem.You'd better move.