I've been considering making this a daily, but I won't for the time being. Anyway, let's get on with it. For those using Firefox, I think I've figured out how to display text in it. If it doesn't display properly, go to View, Character Encoding, More Encodings, East Asian, and select one of the Japanese options (probably Shift_JIS).
しんじられない (shinjirarenai) - "can't believe it", from the verb 信じる (shinjiru) - "to believe", "to believe in", "to place trust in".