In the design industry: an illness that is contracted through consistent client requests to center content: images, text, alignments, etc. The worst cases of centeringitis are seen through constant requests and even requests of having multiple central axis points on the same piece.
Johnny, I think I have contracted centeringitis and want to jump out the window.
A nickname for someone who is really happy, we are all made of Atoms and by using this nickname to someone, it will tell them that they are an individual!