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[upthera44.livejournal.com]

Here are a few miscellaneous Russian language questions I've had recently: 

1. If someone uses an unfamiliar word, to clear up its meaning you can ask "Что это такое?" But if you want to re-use the word in your questions, does the "такое" change? For example "  
-Мы сидели на скамейке.
-Что это такое?  или Что ТАКАЯ скамейка?

2. Are the words здороваться and прощаться used the same way that they are used in English in the following sense: 
-We greet each other every morning by the supermarket - Мы здороваемся каждое утро возле супермаркета 
-We said goodbye and I went to the train station - Мы прощались и я пошёл на вокзал

3. I've heard a Russian slang word that means something like "a slob" or an uncultured person -- it sounds something like хрюща, but I can't find it in the dictionary. Could you tell me what this word is?

Thanks