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
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 29, 2011
 Get the Sixty-Threemug.
Get the Sixty-Threemug. by Evan_McLoughlin November 4, 2020
 Get the Sixty threemug.
Get the Sixty threemug. 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
 Get the three-sixtymug.
Get the three-sixtymug. 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.
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).
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 24, 2006
 Get the 360 (three-sixty)mug.
Get the 360 (three-sixty)mug. by DespacitoLigmaDab September 16, 2018
 Get the two-hundred and sixty-threemug.
Get the two-hundred and sixty-threemug.