all your base 

Some stupid internet phenomenon that has geeks across the country drooling with amazement at some bad grammar. The common geek inserts the phrase "all your base" into any random posting on a website, and therefore thinks he is cool. It originated from some bad Japanese translation in a Videogame called "Zero Wing". People thought this was amazing, and started saying all your base all the time. See pwned and numa numa.

Geek: 0|\/|G 411 70u|2 b453 #4#4#4#4.

Translation:
(OMG ALL YOUR BASE HAHAHAHA)

all your base by Blackwood November 13, 2005

5th Base

When a guy is having anal sex with a girl and he takes a large hoop earring, interests said earring in her butthole to make it gaping and then the male drops his balls into her butthole and removes the hoop earring for a tight fit of his balls in her butthole

Dude 1: Yo bro i just hit 5th base with this bitch
Dude 2: Deadass b?

5th Base by pattybey December 16, 2016

Based 

To become forgetful, or really spacey while high on marijuana.

Me: "What were we talking about? I'm so based."

Based by always-so-damn-high May 3, 2011

second base 

when
If you're a guy:
You're touching your female partners boobs or vagine
If you're a girl:
You're touching your male parthers penis

Last night when I was with sharron I got to second base!

second base by clarkey buttfunks January 9, 2007

Base 2.0 

Like second base, but much kinkier. Can involve hands way down pants, way up shirts, etc.

"Dude, me and Mattie went to Base 2.0 last night! It was hot!"

Base 2.0 by antithesis3 January 6, 2009

∞ base 

When one does so many bases, that the have an infinite orgasm.

me: I began running past 4th base, and kept on going to ∞ base. Now I just keep on orgasming, it never stops. I am one with cum.

you: Whoa. I got to get there.

∞ base by ∞ baseman November 22, 2010

40th base 

The last of all bases. To turn yourself into a transexual and then rape your best friend and mother.

A- Sorry about your asshole I just wanted to get to 40th base.

B- I understand.

40th base by ALo╛Prezidente August 11, 2008