A phrase used when one either: (1) Does not know what is going on, (2) does not know what just happened, (3) does not know the answer to a question, (4) or simply would like to break the silence.

Usually, when said phrase is used, it is followed by a near-endless spree of other quotes such as:

1.) Psh, I don't even know.
2.) Aw hail naw.
3.) Aw hail naw, cracka.
4.) Mmm hmmmm!

The phrase "I don't even know" is best used in the classic "I don't even know" speaking tone, which may only be properly "voiced" by either a colossal, Japanese monster, a small cat/kitten, or a constantly hyper-active younger brother.
"Matt, why aren't you talking?"
"Psh, I don't even know!"
by I Gojira I October 31, 2007
i don't even know
human 1:where is you're mom?

human:i don't even know
by achoman/powdahoo/hrman February 12, 2022
This clever phrase was invented by the bright, young man, Chris Allen. He patented the phrase on July 15, 2007. The phrase, "I don't even know," is quite an unique expression. It can be used as a extreme adjective to describe the undescribable, or it can be used to express thoughts of confusion. It can also be used as a verbal space filler. This phrase will go down as one of the best phrases in all of phraseology history.
"Man, that girl is as ugly as... i don't even know."

"What's going on tonight, bro?"
"I don't even know, man."

((When in a conversation and an awkward silence comes up))
"Yeah, well, I dont even know."
by C.Allen February 23, 2008
A tired old gag line to say whenever someone says the word 'liquor'.
Drinkin' Man 1: "Hey, let's go get some liquor!"
Drinkin' Man 2: "Liquor? I don't even know her!"
by Figleaf23 September 7, 2007
This phrase is tagged to the end of one's speech in order to reveal an innuendo or undertone. It is expressed with a wide-eyed expression and a tone of confusion. It is often synonymous with "That's what she said".

Unlike "That's what she said", it is proper for one to add this phrase to the end of his/her own speech, as well as for others to do the honor for him/her.
Scott: "This female's pelvis has been articulated... I don't even know what that means"
by Carriacou Archaeology 2008 August 2, 2008
A new phrase thats rapidly gaining in popularity, this is used to describe ones condition if one is utterly confused, wasted, high, or just plain out of it. Its often used to describe situations that have already happened but is not limited to that. There are many variations, a few of the more common ones are following:

-I don't know what hole to put my dick in
-I can't even tell which hole to put my dick in
-I put my dick in all the wrong holes
"Man, that party last night was so crazy I didn't even know which hole to put my dick in."

"Algebra is so confusing, I don't even know what hole to put my dick in!"

"I feel bad about that chick the other day, I was so wasted I put my dick in all the wrong holes..."
by ybsubnairb December 11, 2009