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It means cute in japanese,mainly used in anime and manga. It has become a popular term in the English language now.
Kitty: Purr...
Girl: Awww, so Kawii!!!

Or...

Boy: Sakura looks so kawii with that hair cut...sigh
by kotori_m April 23, 2008
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Jul 2 Word of the Day
Someone people turn to when they're sad who makes them feel better.
Dude, I was so unhappy about my girl, until I spoke to my serotonin donor who really helped me feel better
by jonfurstn1 November 27, 2009
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