All of the other definitiions were missing one technicality that made them wrong. This expression requires and exclamation mark following the question. This statement is used when you are completely engaged in the topic of converation and couldn't agree more. To denote the proper meaning, a question mark should not be the last symbol -- this is not a direct quetstion and is strickly rhetorical.
Party #1: Blah, blah, blah...see that over there -- I want that.
Party #2: Wow! Oh my gosh, it's perfect!
Party #1: I know, right?!
by Truth-Talker May 22, 2011
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Phrase used to express agreement usually over something very annoying or something relating to yourself.

"OMG Emily thinks she is so hot."
"Ew I know right!"

"Your dress is gorgeous!"
"I know right!"

by Bonnieeee June 20, 2006
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Preppy way of saying you agree with someone, without actually sounding too smart. Native to Northern California.
Becky, "I love brunch, it's hella cool"

Sam "I know, right".
by The apple of doom July 11, 2008
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An arrogant idiom used by insecure people to pretend they already know whatever it is someone tells them.

Widely confused with a request for affirmation, the question "right" is an attempt to bully the other person.

The idiom demands that everyone agree that "I know" because there is nothing you can say the insecure "I know right" idiot does not already know, right?
There is a giizzly bear sneaking up behind you...

"I know right?"

I just discovered the answer to P=NP.

"I know right?"

I named my baby Mary. You are the first person I told.

"I know right?"

Your zipper is down.

"I know right?"
by Shmata Than July 6, 2017
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A phrase most teenies/preps/popular bitches use in expression of ''I can't believe it either''
''OMG can you believe Jessica?''

''I know right! What a slut!''
by DizzyLizzy February 15, 2007
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Derivative of infamous Mean Girls quote, frequently used in parody of this film to indicate a mutual understanding.
Person 1| "That Katie girl is a right tramp"
Person 2| "I know, right?"
by creamcream May 16, 2006
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usually followed by "yeah, uh-huh!"
and then, if desired "that's hilarious!"
then this proceeds in repetition of the three phrase cycle until one person or the other is sick of the cycle.

usually spoken in agreement to a previous statement.

could also be in ditto form.
"this coffee is bogus."
"i know, right?"
"yeah, uh-huh!"
("that's hilarious!")
"i know, right?"
etc.

"i totally flunked that test."
i know, right?"
"yeah, uh-huh!"
("that's hilarious!")
"i know, right?"
etc.

"we have to stop talking like that."
"i know, right?"
"yeah, uh-huh!"
("that's.. not hilarious!")
"i know, right?"
etc.
by awkwardsentence November 12, 2009
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