What's a deal breaker for you?

This thread already exists, in the Likes/Dislikes area I think. But I'll put throw my two cents in. Drugs is pretty much a deal breaker for me. Heavy drinking is too, and I don't think I could date a smoker either. I'm also turned off heavily by people who have had "too many" sexual partners. Strippers are also a deal breaker for me. I can't think of anything else besides obvious things like if they're a known liar, etc.