My try at this: "who is that?" she's an "old (vulgar word for prostitute)" she is? naw, she ain't. (could be "no I'm not" - sometimes I get confused) but it is "she"! get it? (understand?) and the other phrase you were asking about is a vulgar phrase that literally means "into the (vulgar word for your bottom)"
which, if you've ever spent any time v hospodě or more likely v hospodach, is pretty much all you will ever need to know! Have you ever been to "žižkovská republika?" It's brilliant but my goodness you pick up some words there!!!
