1 definition by A Sympathetic friend

Top Definition
A codeword for when girls have their monthly business. Derived from the appearance of their national flag.
Girl1: Holy shit, I don't feel well at all.
Girl2: Oh really? What's wrong?

Girl1: I'm in Japan...
Girl2: Aw, take an Advil.
by A Sympathetic friend May 09, 2009

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