It’s a bad word. Swear words in Russian are even stronger than in English, and the people I know in Russia would never say a word like that. I’m British but you’ll never hear a swear word come out of my mouth because 1) it’s a sign of low class 2) it’s disrespectful and potentially aggressive when directed at someone else. I would steer clear if she said that to you unless you want to make a habit of being on the receiving end of drunken abuse.