to know 

being acquainted with

i know how to tie my shoe

i know this guy named McAleer...i think he pronounces his name wrong

to know by Dont look back in anger October 30, 2004

to know the score

to understand how things work, not to be naive about things

In the song "New York City Girl", the singer tells the New York City Girl that "you should know the score by now". Meaning she shouldn't be so naive. She shouldn't think that love is going to be like the Broadway shows, i.e fairy tale like. She's had enough bad experiences to know better, "to know the score by now"!

to know the score by L. Centeno November 14, 2006

to know anything off by heart 

To learn something and keep it in mind for a longer time.

Synonyms:
To memorize
To learn by heart

Andy knows that it isn't easy for him to know anything off by heart.

to know anything off by heart by SmokingSkull January 22, 2011

to know shit 

- a state of being
Being familiar with a topic or a broad range of topics. Either having extensive knowledge in a subject that your peers would consider you an expert, or having a firm grasp of a variety of topics that can summarize a wealth of practical knowledge.

You should listen to him, he really knows, his shit!
Trust me, I really know my shit.
This sentence is required to know shit.

to know shit by TheStylingDude March 10, 2016

To know better is to do better

1.) been there done that
2.) growing up
3.) seeing things for what they are

To know better is to do better
Trusting YOUR intuition.

To know better is to do better by Pretty&petite May 23, 2026

ntk - need to know 

This is a self defining phrase used in high security settings such as the military and intelligence fields.

I am sorry we can't share that sort of file with you. If it existed it would be on an ntk - need to know basis.

ntk - need to know by I, Wreckerrr July 5, 2020

it takes one to know one 

This means that no one is better at finding a wrongdoer than another wrongdoer. So if you do something wrong, then you would know if someone else followed your mistake, or you would know someone with the same quality as yourself, did the same mistake if that makes any sense lmao. The example will help better your understanding.

Zack: You are a two faced bitch!
Clay: It takes one to know one.

it takes one to know one by GrammarQueen August 23, 2017