Top Definition
A white tsunami is a when you throw a bucket of cum on the back of a girl as you climax. The action is usually accompanied with a loud COWA BUNGA DUDE! The girl then rides out the wave. Bonus points if she still has her sandals on.
Dude, it took me 2 weeks to fill up that bucket, but it was totally worth it to let loose a white tsunami on Andrea.
by LulzBrah June 14, 2011

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