I haven't had a chance to work KY into a conversation but I've seen plenty examples of it.
Another one I learned from my dictionary is Kuru Kuru Pa. Kind of like your mind has snapped and your crazy now or, better yet, scatter brained.
Awesome - my favourite Izakaya when I was living in Japan was called "Kuishinbou". Now I know what it means! I think the name was well suited because the master always used to add a knob of butter to everything. I think going to that place has taken a good ten years off my life, but it was worth it! During the night he seemed to constantly drink and smoke, and get louder and more genki as the night wore on. He was my hero. As well as that, they had the best tasting beer in town. :)
I forgot to say, my favourite Japanese phrase is "Otsukaresamadesu". I'm not exactly sure what it means but all the staff at my local shopping mall said it to each other, and it was one of the first things I learnt when i started working there. I think it's something like "do your best, or keep doing your best". Correct me if i'm wrong. Also it was always said so quickly, it ended up sounding like "Osamadeeeeessssss" hehehe. Kind of like "arigato gozaimus" always came out "azaimus"