Its like I cant believe that. sort of like "stop lying!" or "get out of here!"
Pennny: hey girl, did you hear Kiesha was pregnant
Dee: Bitch! I know you lyin!
Penny: naw girl she showed me a picture of her ultrasound.
by MJ_lit February 14, 2017
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This is when you are in love but she or he doesn't like you. You and he or she are not friends you just know each other. Therfore you are not even in the friend zone but the i know you zone. ;(
George: "man I am in the I know you zone, I am so sad"
by Asa The Definer March 15, 2017
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Something somebody said something you don't want to hear or you know someone lying
Your my girlfriend I know you lying
by Adsdhwn July 14, 2019
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A common reaction when in disbelief of someones actions or words.
Ohhh know you didn't! How you gonna play me like that?
by Sophie February 11, 2005
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1. Phrase used when someone recieves a compliment & is confident that it is a well known fact.

2. Used when someone is in agreement with what someone else has said, and wants to give props or show mutual agreement.
1. Guy: "Yo sweatheart. That's a lil' fatty you got rite there"
Female: "I know you know."

2. Female: "Apple bottoms make them jeans that be fittin."
Female: "Girl...I know you know"

by Mizz Phatz June 10, 2008
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Used to describe a situation where you and someone else are aware of the mistake that a 3rd person is making. For this to be an "I know, you know." the 3rd person should be blissfully unaware of the situation.
"Hasn't Yoshi twigged that bird over there is a shemale?"

"I know, you know."
by Scotsdave December 02, 2004
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