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.")
An tradition held at Iowa State University. In order to be considered a 'true' ISU student, a girl must be kissed underneath the Campanile at Midnight.
When playing the game of Call of Duty Modern Warfare 2, a Campapotomus is someone who sits in a corner with a hearbeat sensor and/or ranger or model shotguns, this is most annoyin during Search and Destroy when the only person left is a campapotomus and everyone who is dead is forced to watch him.
Jack, "Ugh i got killed by another campapotomus and I was one away from a stupid chopper gunner"
Justin, "I'm sick of these campapotomuses its like every time I turn a corner he's blasting me with his rangers He just doesn't move.