Top definition
Said in agreement to a statement or question. See word
-Thats a massive spliff you just rolled
-You know it
by Stoner 04231 November 25, 2003
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May 8 Word of the Day
1. Slight sins or offenses
2. Petty crimes or small infractions
3. Las Vegas Punk Rock!
Peccadilloes shows rule.
by James Messina August 11, 2006
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used when recieving a compliment or a praise

a confident catch phrase
Guy : "damn girl you lookin good today!"
Girl: "You know it!"

by samerin June 07, 2006
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simply the greatest three words you'll ever hear. the magic password to quickly get you out of any situation.
must be accompanied with a twisted right leg kick across the left leg as the left arm comes twisting across the body in a punching motion. when performed correctly, everyone will know it.
1. b: did you see that guys leg kick?
j: you KNOW it!

2. b: did chuck norris just get eaten by david hasselhoff?
j: you KNOW it!

3: g: is that a herpes bump?
j: you KNOW it!
by brianisgay January 20, 2006
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a euphemism: it is an indirect, quasi-sensible answer to any question.
Pamela: yo, Dolly have you seen "Final Destination 5" yet?

Dolly: you know it
by JessieJackson124 November 13, 2012
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Originally coined by Frank The Tank (Will Ferrell) in the movie Old School, this phrase is now running rampant in college campuses across America. Can be said in agreement to a statement, or in answer to a question. Also at random times if you're bored.
1: F: Awesome... YES! I am back. Woo! You KNOW it!

2: A: This Karkov tastes really good.
J: You know it!

3: D: Dude, did you just pass me in Mario kart?
B: You know it!

4: J: God I'm wasted... YOU KNOW IT!
by JK February 08, 2005
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