first base 

south west corner of the field providing ample opportunity to declare players "OUT" and prevent them from scoring a home run.

10 Byrds landed on first base

first base by fo my pizz da playa December 26, 2003

First Base Friends 

A non-sexual friendship that includes flirting and occasionally making out.

Girl 1: "Hey, I saw you and Brian making out yesterday. Are you two an item?"
Girl 2: "No, we're just first base friends."

First Base Friends by nhw6789 May 7, 2010

desi first base 

making eye contact with another person, preferably one of the opposite sex (or you will be severely punished)

It was love at first sight yaar - I reached desi first base yesterday with anarkali and she reciprocated!

desi first base by Dan Babu November 30, 2006

mormon first base

Engaging in hand to hand contact. In other words, holding hands.

I walked in on Doug trying to get to mormon first base with a girl, while viewing a non-rated R movie.

mormon first base by mormon_playa October 10, 2007

Canadian First Base 

Like American First Base, but with a finger in the butt. Also known as a Morneau.

"I went out with that Canadian girl."
"Did you make it to first base?"
"Better. Canadian first base."
"She gave you a Morneau, eh."

Canadian First Base by Bahbarqer Sanchéz August 9, 2016

ass from first base

A hyperbolic distinction that only a blithering idiot could not make. Also ass from a hole in the ground, shit from shinola, can't fight his way out of a paper bag, dumb as a rock.

When it comes to installing drywall, I don't know my ass from first base.

ass from first base by octopod November 12, 2003

First and a half Base 

Under the shirt, bra still on. Often followed by a slap to the face and a lonely night of masturbation.

She had such a nice rack, but I only got to first and a half base, so I had to spend the rest of the night with me and my monkey.

First and a half Base by Anonymous March 16, 2003