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).