2
folicular sex, or sex with hair follicles. warning this can cause severe bleeding.
mike: oh my justin! did you hear, josh and jessie got to 9th base last week!
tim:holy shit, that's why she hasn't been at work all week!
by ilove9thbase August 22, 2010
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3
having sex with every-thing in the planet that moves at the excite same time!
currently only Chuck Norris has achieved 9th base.
by sambodo August 12, 2008
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4
Anal sex with someone from behind whilst you place your hands around their throat and strangle them.
Jacob : Hey man, Im so going to 9th base with you tonight is that cool?

Dan Mcgree : Hell yes its cool, I want it badly I hope your ok with it though..
by Jacob6969Amsterdam April 26, 2007
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