There's a scene in Almost Famous where after spending some time on the road with Stillwater, William Miller, the 15 year old journalist, greets the crew and everybody via nicknames and all of that. Just like he's one of the boys.
I wonder if McCosky does that in the locker room. "What up Greenie! Mizer, how's the elbow? JR! I'm so jealous of your porn stache. I've been trying grow mine for 40 years"