Quote Originally Posted by rimz View Post
"Маскаляку на гиляку! - Hang Russians!"
"Москаль" is not "a Russian". This word has a long history, but I'll just summarize the contemporary usage.
It's a person, as a rule a Russian but not necessarily, who thinks that Ukraine must not exist, or must be a part of Russia. Or thinks that Ukrainian nation or language do not exist, etc etc. That sort of person.

I have no idea about how serious about that phrase are ultra-nationalists, but ordinary people usually use it for trolling Russians.
And Ukrainian Russians can easily use it, too, by the way. Although, I think, most Russian-speaking people in Ukraine are identifying themselves as Ukrainians. It's difficult to tell. There is no "nationality" field in our passports and I don't remember this matter ever to come up in conversations.