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1.
Japanization of the word 'fuck', might also refer to a popular website that hosts hentai doujin and videos
Kimi wo FAKKU-shite kudasai! ^__^
(Please fuck yourself! ^__^)
by fakkeur January 16, 2010
 
2.
Fakku! is the world's largest English speaking hentai website on the net. It averages around 300 million page views a month. Fakku! was created in December of 2006.
Fakku! All About Hentai.
by hubu November 30, 2011
 
3.
Japanese word for fuck. Not used for sex.
anata no ikimasu fakku. Not sure if that is exactly right. It's supposed to mean go fuck yourself.
by Okita-Sama March 01, 2005