169th Base 

To have sexual intercourse with a monkey (any type of monkey) while having Cheese inserted into your arse.

Guy 1 : Hey, i got to 169th base last night.

Guy 2 : Remember the cheese?

Guy 3 : Hell yeah, i used Bree.

169th Base by IcyDeigh March 25, 2010

19th base

having sex with an inanimate object yet still reaching an orgasm. the object must also orgasm.

only 2 people are known to have achieved this. ron jeremy and chuck norris

ron jeremy: i got to 19th base with that sexy tree down the road

chuck norris: *ROUNDHOUSE KICK*

19th base by andrew osullivan September 11, 2006

16th base 

having butt-sex with a goat

16th base could be living on a farm working with goats and you get horny working with them and you get a boner and do one up the ass. BANG BANG BANG!!

16th base by rudy macintosh September 15, 2008

129th Base 

Having sex and not having sex at the exact same time.

Tom: wait, how do you even get to 129th base?
Bill: the easiest way is to fuck Schrödinger's Cat

129th Base by mmm.grapes December 26, 2009

149th base 

Sit there listening to opera, whilst eating a biscuit making sexual noises

'Dude! I totally did 149th base last night!'
'Gees dude, that's grose'

149th base by lalalalalalaaaaa January 18, 2009

119th base

when you have sex while eating ice cream

Dude i just got to 119th base with my gf last night!
Really?

Yea!!!!!
I WAs tottaly having some moose tracks again tonite

119th base by ihacklover April 25, 2010

109th base 

When you celebrate the 40th time your girlfriend has changed her hair color, this week. This celebration takes the form of first starting on her bed, until it becomes clear that she is incapable of satisfying you, so you switch to the bathroom, hoping a change of scenery will somehow help her along. After three hours of her trying, she will barely get you off, then you can make jokes about her technique for the next couple hours before you leave, laughing. You then must make jokes, for years, about that one day.

You: Wow, that was lame. You really pulled off 109th base, to the letter. What's with your hair? You change it every other hour.

Her: What do you expect? The hair dye sank into my brain, and now makes it impossible for me to do even the simplest of tasks.

109th base by Keeserat1 June 17, 2010