to agree or support in the most absolute form.
person 1: those mountains are beautiful!

person 2: know it!
by sara v January 19, 2009
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someone who comes off as knowing everything about everything, but upon review is mostly incorrect.
Chris started in today about common-era anthropology...wow what a know it not!
by sandspit December 31, 2009
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A person who simply doesn't know what's going on or being said around them.
Yeah, J.J.'s Not Knowing.

(He's the only one who has no idea what we're talking about.)
by OdontEvnGetMeStartd August 06, 2019
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"People in the know are aware of a nuclear explosion if even the slightest jolt was made upon the renegade carrier."
-part of the storyline for Blast Corps
by Dave October 21, 2004
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1)to have intimate knowledge of a particular subject not necessarily every subject.

2)to be privy to uncommon knowledge

you know who Gwyneth is dating?

ask Rita she's in the know
by i heart your mom March 31, 2006
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in Biblical times, it meant to sleep with someone. you will see the word used in the Bible to mean that.
God: "Abe, you knew your maidwoman as well as Sarah? And she gave birth to that bastard of yours, Ishmael?"

Abraham (boasting his double scoring): "Yep, God. My sons are Isaac and Ishmael."
by terrell mateo May 28, 2003
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Absolute knowledge of the future said in past tense before it actually happens.
I knowed we will be married.
by DAKnowed November 27, 2008
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