When one or more men shits on the balls of another man.
A Warm Josh would be if the target has cellophane wrap on his balls and one or more men shit on it.
A Cold Josh is when one or more men poop on glass above the target man's balls.
"I thought I had a "chilli dog" but one or more men shit on my balls, therefore it was a hot josh."
"What did you do last night?"
"Stayed in and had a hot josh party."