This is a catch phrase that originated in a TV ad in the late Eighties that featured super athlete extraordinaire Bo Jackson and rock'n'roll pioneer Bo Diddley (he's notorious for his famous box-shaped electric guitar). Basically, the term means that somebody doesn't know doodly squat.
The narrator says:
Bo knows football.
Bo knows baseball.
Bo knows weightlifting.
***********************
In the meantime, Bo Diddley cranks out the notes on his guitar.
Then he says:
Bo, you don't know diddley!
by I Saw U2 Live Twice October 2, 2007
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A phrase used by older people when a younger person shows admiration for something from said old persons era. Commonly used in jest
Grandson: *puts on ray Charles*
Grandmother: oh baby You don’t know nothing bout this!
by Therealrealrealll September 29, 2018
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You don't know about me

A vague and mysterious phrase to suggest people don't know something about your character which you have kept a close secret. Just like hiding something in the closet.
Andrew shouted loudly and repeatedly 'You don't know about me! You don't know about me!'
by Flimsco April 5, 2020
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Away to tell someone they don't know your space, or they don't know your business.
by Jenn N Davin July 20, 2018
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a rock band from Texas
often simply called "Trail of Dead"
a very good band and in my opinion the hope of alternative rock, a genre that suffered so much in the past few years.
they got everything: musical talent and the jolly good ambitions to bring variety into every album, cool lyrics, stylish artworks and on stage they simply ROCK! make sure to be there if they are around for a show.
i simply like ...And You Will Know Us by the Trail of Dead - although first i thought they play some emo crap. but then i listened to them!
by sgrDD March 20, 2008
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ah know you

I sign of respect. Showing that you have heard all about the exploits of a famous cooler.
Get me a beer will ya. Ah know you.
by captain poopypants November 13, 2004
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You Dont Know My Life

A typical saying when someone trys to diss you
Lori: James, why do you have so many hair products??
James:..YOU DONT KNOW MY LIFE
by K-Roth December 22, 2005
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