9th base 

Fingering a girl with one's big toe

"Yeeeeah, my big toe got to 9th base last night!"

9th base by Jimmy Paladino August 23, 2005

9th base 

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!

9th base by ilove9thbase August 23, 2010

9th base 

having sex with every-thing in the planet that moves at the excite same time!

currently only Chuck Norris has achieved 9th base.

9th base by sambodo October 9, 2008

9th base 

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..

9th base by Jacob6969Amsterdam May 7, 2007

9th base 

to get pummelled up the bunghole by a random stranger

omgomg i got to 9th base last night with a welshman

9th base by luke August 9, 2004