Lol, this is not my favorite word, but it's the most used in my envronment (because that's practically the only word everyone seems to know in Japanese around here

. I really dont use it that often...the english version, spoken in a low, sharp voice somehow appeals more to me...)
Baka....
I know, it's stupid.
I dont know enough Japanese to choose a fave word, though. I'll get back on it when I've learned more.