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

The Big Book Of Shit To Know 

A guide to life created by "The Krew" in a small Texas town. The Big Book Of Shit To Know (BBOSTK) is a compilation of what up until now has been secret knowledge held only by Bahdist* (see Bahdist) Monks. BBOSTK is like the Bible in the fact that it is a large book and it can be used to beat your children with, slam your dick in, etc... but unlike the bible it contains the tools to create happiness and success in life. BBOSTK has been adopted by organizations such as the Illuminati, Charlie Sheen, and Your mom and her gorgeous tits.

Please excuse me for not being able to post an example I am terribly busy. I must finish this line of cocaine on this hookers ass and proceed to rob a bank whilst naked...and fully erect. Yet another day in the life enlightened by the Big Book Of Shit To Know

The Big Book Of Shit To Know by Tuck on behalf of The Krew JBH September 14, 2011