1:1 

A term used to describe counterfeit goods of extremely high quality, so much so that they look identical to the authentic product.

Commonly used on r/fashionreps and among other counterfeit clothing communities.

Wow, Aooko’s ‘Ray-Bans’ really are 1:1.

Just got some 1:1 Yeezy knock-offs from China.

1:1 by ultimateharibo June 12, 2018

1:1 

Short cut definition for a one-on-one meeting between an employee and their boss. Commonly used in the subject line of an email or meeting request. Not intended as a formal meeting to review one's performance evaluation, this meeting is often only 30 minutes and is conducted weekly or every other week.

I had my 1:1 with Kevin last night down on the first floor conference room.

1:1 by AndrewMcL June 18, 2009

1:1 

Binary notation for rating the attractiveness of a female human. 0 is no, 1 is yes. First number indicates willingness to perform oral sex in front, the second number oral sex in back.

Technical details are beyond the scope of this paper.

PDG

"Damn, Minka Kelly is hot, definitely 1:1."

1:1 by PDGZ November 10, 2020

1:1 

A copy of something that is exactly or almost the same as what it’s trying to copy.

I can’t tell if this is a copy or not, It’s like a 1:1 copy!

1:1 by Ilbeity January 6, 2024

1_1 

when your making a username but want an emoticon

hmm i dont know what to have as a username but i want an emoticon like a nerd, dang none of those are allowed guess i'll use 1_1.

1_1 by NoNameBoixXx the gamer February 16, 2021

1 - 1 

it's 0.

1 - 1 = 0
One minus One equals Zero

1 - 1 by SomeRandomGuyWhoLikesNoodles December 27, 2023

1-1-Six 

116 is a nationwide movement of believers of the Christian faith. Started by Lecrae, Trip Lee, and Tedashii. They are not only a rap group, but they are a group of people worldwide who are not ashamed to speak of The Gospel of Christ and also live it out.

"Rmns: 1:16-'I am not ashamed of the Gospel because it is the power of God for the salvation of everyone who believes.' You ain't ashamed to represent then hollah 1-1-Six"

1-1-Six by T-Ler and BE-EM August 23, 2011