Why do Japan's teens sound so incomprehensible these days?
The 1,423-page "Gendai Yogo no Kiso Chishiki" (Encyclopedia of Contemporary Words) recently came out with its 2003 edition, which devotes five full pages to the latest patois.
Many of the new terms it lists are made by creating contractions, so that kimochi ga warui (unpleasant or disagreeable) becomes kimoi, and muzukashii (difficult) is shortened to muzui.