A thing so long you cannot describe it. Almost infinite amounts of longness. The "long" can also be replaced with other words like "short", "red", "sexy", and etc.
"That tube is god knows how long."
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When something (an environment or event) gets you so excited that you do something outrageous in reaction. Origin is possibly from the Flo Rida song of the same name.
"Look at you - first 50 degree day after winter and you aren't wearing a jacket - you don't know how to act..."
by charlesgriffingibson March 11, 2014
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A common phrase used to replace the outdated “That’s what she said” pun.

You know how it is can be tacked on to any sentence, word, or phrase, that alludes to sexual or inappropriate context.
John: “Man, that was really hard....you know how it is”
by You know how it is April 11, 2020
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The statement used after being told how something works or functions.

Even if you may or may not know how this something works or functions, use the statement anyways to cause laughter.
"We're going to have a surprise party; where every one will hide and when the birthday girl arrives we will jump out and yell surprise!"

Nearly interrupt the previous statement with:

"---Oh, I know how it works."
by Smashley22 September 15, 2009
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What a member of a group would say to suggest that some behavior is the group style, or that it's the way they usually do things. Usually said with anything from excitement to modesty, it is the response for anything from a compliment to disgust to total disbelief.
Was that you guys last night, outside the police station?

You know it.

Dude that's AWESOME/messed up/brutal/so fucking sweet.

Hey man; you know how we do.
by Lenny Briscoe January 24, 2007
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When someone either genuinely does not know how to respond to something or is trying to avoid the topic of conversation. Often used to make situations awkward, and can be used to end conversations.
friend: my girlfriend just cheated on me
me: I'm so sorry to hear that
friend: I wish I could get over this in two seconds, ugh I hate life.
me: I don't know how to respond to that
by Born_2_Win_145 May 12, 2019
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