("Kimochi warui" is how my feistiest niece's kindergarten classmates in Japan described her blue Irish eyes. "Your blue eyes give me the willies!" She always fought back when teased or excluded—and still does to this day.)
When I googled "kimoi", I found an interesting set of similar terms on the sci.lang.japan FAQ wiki.
chi warui 'feeling bad/unpleasant'
o kusai 'troublesome' (lit. 'stinking of trouble')
shiroi 'interesting, funny' (written 'whitefaced')
UPDATE: Two commenters who are far more kuwa