3.14159265359 Base

Having anal sex then calculating the circumference of her asshole to the diameter using Pi.

Person 1: have you gotten 2nd base with her yet man?
Person 2: even better! I got to 3.14159265359 Base!

by xopurp November 5, 2021

base pit

when 1lb or more of marijuana is lit up in the center of a small room / area and is for ultimate high for all users . most often used in back of stoner vans, raves, or stress relief .

let's go to paul's and smoke up the base pit!

by warstartah9432 August 10, 2009

Base slut

A base slut is someone that plays the bases alot. I.e. 1st base making out. 2nd base more advanced making out. 3rd base Oral sex. And a homeplate (homerun) being sexual intercourse

Man, that Aiisha, she a base slut she on 3rd base every nite with a different guy.

by Ryan & Breanne July 15, 2004

Base Up

To 'Base Up' refers to one of three things.

1. The application of hand sanitizer (from the base to the tip, hence the name) to ones genitals before or after a particularly questionable bout of intercourse (though a post-coital 'base up' is less likely to result in unwelcome friction).

2. In reference to the sexual encounter itself, whereby you engage in risky business and will likely require the application of 'Base Up' in the near future.

3. As a noun referring to the sanitiser itself.

"I didn't use a condom, better base up"
"Should we base up before going to the clubs?"
"Who used all the base up?"

by Power Wine January 2, 2012

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."

by Mr. Supotco November 13, 2015

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"

by Keeserat1 April 13, 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.

by LoveDoctor January 15, 2009