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Definition: A japanese insult Yahiko used to make Kaoru extremely upset

Translation: ugly hag, ugly, hag

Yahiko: Come and get me BUSU!!!

Kaoru: Yahiko no Baka! You come back here!!!
by Himura Kasumi May 13, 2003
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Bag up before you slag up, the most important mnemonic for any young men going out on the prowl. Remember to wear a raincoat before you tup skanky women.
If you're going out don't forget to BUSU, bag up before you slag up
by fluvial September 13, 2011
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