The psychological disorder when two friends hang out so much that their friendship borders on codependency, and they only act out when around each other. This results in dick riding that is usually harmless but can turn into chronicdouchebaggery if undiagnosed.
Me: those guys are really cool, but not when they act like batman and robin. Its unhealthy.
Jesh: yeah dude, they are totally goat and oyster.
A old relatively new trick devised by medical students at the University of Nairobi when taking Vivas. Where the goat is the student and the tree is the little knowledge he/she has, so you herd the goat to the tree and tether him there and graze until the time runs out or he is full
Distraught student: My pathology Vivas are tomorrow what am I going to do
Equally distraught but confident student: just use the old goat and tree