Top Definition
The sense of almost boyish enthusiasm that comes over middle aged men when pursuing a hobby that requires expensive stuff and leaves non-hobbyists scratching their heads to figure out why it's so damned important. (Derived from Roy Campanella's observation about baseball: "You got to have a lot of little boy in you to play this game.")
When Jerry began talking about model railroading, it was easy to see the Campanella Effect in action.
by PaldanTheLesser May 27, 2011

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