i know karate, i know kung fu, you mess with me, i mess with you!

I think I'm cool and I totally pwn you so don't mess with me!

One might say "i know karate, i know kung fu, you mess with me, i mess with you!" To ward off unwanted attention from bullies. Mostly unsessful.
Also, a phrase used often by geeks trying to sound cool.

i know karate, i know kung fu, you mess with me, i mess with you! by tidiris tulzwick December 14, 2008

de-know 

To claim not to know someone when you actually do. Usually used to avoid embarrasment by friends.

Person 1: Hey look at me strip dance
Person 2: Don't you know that guy?
Person 3: I've never met him
Person 1: I've just been de-known

de-know by _dRo_ April 21, 2006

I know that a lot 

A grammatically bad phrase to use when someone says something REALLY obvious.

Aaron : "DUDE DUDE DUDE! DID YOU KNOW THAT THE PACKERS ARE IN THE SUPER BOWL?"

Max: "I know that a lot, you dumb shit."

I know that a lot by BigMikeDonovan February 22, 2011

Lee know 

Simp for Jisung

You know I know lee know

Lee know by mahveenisasimp July 1, 2020

C-U-know what 

a way to spell "cunt" or "C-U-N-T" without having to spell the whole thing; a play on words

"I'm done with that C-U-know what. She's triflin."

C-U-know what by Adolf Oliver Bouchere May 27, 2008

she don't know sick'em! 

Southern Ontario rural-ism, meaning, she is dumber than a dog... The longer version of the phrase, which is seldom spoken, is "She don't know sick'em from fetch!"

Did you hear your Aunt Sue, arguing around the table with everyone?! There is something WRONG with that woman! She don't know sick'em!

she don't know sick'em! by Pablo Vertais August 25, 2017

I don’t know what to do

UD Jews, I’m talking to you guys

I’m very confused and am unsure as to what I should do.

My friend said I know the truth and that I shouldn’t be worrying. But things are getting really tough.

Will the stock market crash soon or will WW3 break out soon? That would kinda give me an advantage.

I don’t know what to do.

I don’t know what to do by Zatarain’s Root Beer Drinker January 12, 2023