The most useful phrase one can learn in Russian (after "Ya loobloo peat vodku" - I love to drink vodka) has to be "Nyet, Ya koshka" or "No I'm a cat." It provides an excellent answer to almost any question asked of you....Do you know where the kiosk is? No, I'm a cat. Would you give me the pleasure of joining me for dinner tonight? No, I'm a cat. Did you remember to do the dishes? No, I'm a cat.

Try it out for a few days and I promise you'll get asked less questions!
- Andrea Balboa, a reader's comment in Wordsmith.org