The 1 and 1/2's 

Liquid Poo. A mixture of solid and liquids forming a runny mess.

See you guys later, I have to go to the bathroom.

How long are you going to be are you going #1 or #2?

The 1 and 1/2's.

The 1 and 1/2's by Mike Zuniga November 1, 2007

and 1/2

A phrase used by men, generally added to a fictitious number that they use to describe the length of their penis.

The guy that tried to pick me up last night said he had an 8 and 1/2 incher. The way he talked, I didn't believe, so I didn't give him a chance to show me.

and 1/2 by Panchoman Jr. November 15, 2006

5 and 1/2 

5 and 1/2

5 and 1/2

5 and 1/2 by ZDOGNATION( Waylon) August 26, 2019

Guy 1 and 2

Seemingly in every Urban Dictionary definition. Not sure how they’re not worldwide famous

Guy 1 and Guy 2 in unison: Hi everyone, it’s Guy 1 and 2 and we’re famous on this website because examples are hard

Guy 1 and 2 by nlolhere June 25, 2020

13 and a 1/2 

A term or quote to usually associated with convicted felons or people who did bids upstate that symbolizes "12 jurors, one judge, and half a chance".

This cannon on the block just came home from up top and got a tattoo 13 and a 1/2 on the side of his neck.

13 and a 1/2 by 1Konvicted8Felon7 March 5, 2009

rules 1 and 2 

First two rules of an infamous site on the Internetz. They both mean that you're not allowed to talk about the site. Ironically, rules 1 and 2 have become a defining feature of the site, essentially making them useless whenever cited.

Rules 1 and 2, motherfucker!

rules 1 and 2 by Abdomumibinima April 28, 2007

1 and 2 

Reference to Fight Club, whose two first rules were both 'Do not talk about Fight Club'. May be used for anything secret, particularly an organization or group of some sort.

Person A: How's the plan coming along?

Person B: 1 and 2, man! Shut up!

1 and 2 by Autotroph December 4, 2007