107th base 

When you are with your 300+lbs ex girlfriend, who was thin when you were together, in the back of your car, outside of the college you both attend, and she decides to show you some new tricks she learned from your brother. After she rocks your world, and the back of your car, you pull out, spray jiz all in her hair, then laugh wile driving away. About ten minutes later, you realize you forgot to kick her out of the car first, so you pull over, leave her on the side of the road, and throw bus fair out the window for her, wile yelling "that's for smiling".

Person 1, "Hey, dude, yesterday I got to 107th base."
Person 2, "Really, I don't believe you"
Fat ex Girlfriend, "Yeah, I still havn't gotten it all out of my hair"

107th base by Keeserat1 April 13, 2010

13th Base 

When you have sex with an animal and a person at the same time.

"Dude, that weird dude next door got to 13th base last night."

13th Base by Mr. Supotco November 13, 2015

in this base 

to occupy a specific belief or niche as already stated by someone prior, or to represent a single or subset of options given a few opposing choices. only used on internet boards.

Source: the end of the internet.

John: "RED SOX WILL KICK ASS THIS YEAR."
Jeff: "so in this base."

in this base by superhyperflyingpanda August 17, 2010

2nd Base

A male fingering a female, or a female giving a male a hand job.

We went to 2nd Base, give and get.

2nd Base by LoveDoctor January 15, 2009

Baked Beans 

When one retrieves his testicles from another person's anus, only to find them covered in feces.

Man, Danielle gave me the worst case of Baked Beans I've had in years!

Baked Beans by Matt Koontz December 28, 2005

17th base 

Group sex with your parents and your parents parents.

If one or more of the participating parents is dead and
requires exhumation before participating then 17th base
becomes: 103453rd base,103454th base,103455th base,103456th base,103457th base,103458th base,103459th base,103460th base,103461st base,103462nd base,103463rd base,103464th base,103465th base,103466th base,103457th base depending on the combination exhumed and then group
fucked with.

Me: "While I was at grandma's place she suggested we spice things up a bit and move from boring old 3rd base to full on 17th base."
Friend: "Dude, isn't that pretty far out even for you?"
Me: "Yeah but at least they are all alive, you know."

17th base by Sean the Snorf Dude August 19, 2006

5th base

when you shave your partner's asshole. This is the ultimate expression of love.

Nina and Alex totally went to 5th base last night.

5th base by the big cheese1234 December 10, 2010