A slang term for saying down syndrome, usually used to insult someone. Derived from the fact that down syndrome is caused by having 3 21st chromosomes. 3 *21=63
Example 1- Wow look at Travis there, he's totally acting like a sixty-three

Example 2- Hey man don't make fun of Zach, he's a sixty-three. That's why he fails so much.

Example 3-
Person 1: Hey look at those kids, what are they doing?
Person 2: I remember when I was a sixty-three
by >tdawgunit May 4, 2011
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63the most epic number. Also means yosh
Sixty three

Nice
by Evan_McLoughlin November 4, 2020
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When someone makes a radical life change
1) Last week Jane was going to become a nun, this week she has done a three-sixty and plans to marry Philip next month
by proust March 26, 2010
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1.) The amount of space between two people that one needs in order to be comfortable.

2.) The distance arm length distance 360 degrees around someone.

3.) An understanding of a particular person's thought-life; being on someone's level.
1. Friend: "He must really like you."
Me: "How do you know that?"
Friend: "Cause he was all in your 360(three-sixty)."

2. Rob: "That smells good! What are you eating?" (Comes closer.)
Me: "Dang! Back up out of my 360 (three-sixty)!"

3. Professor Robbins gave me an F on this term paper?! This is the best paper I've ever written! He just ain't in my 360 (three-sixty).
by Carynne May 18, 2006
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