It’s a figure of speech. People can say so if “he” has been having bad luck resently and getting into troubles a lot. It originates from belief that if someone envies to another person, one can cause injury or bad luck by ill-wishing look. Here you can read more about it: http://en.wikipedia.org/wiki/Evil_eye

It means they looked at him in a way that showed they didn't like him - usually a glare or narrowed eyes.

it means they dont like him