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To do that which is both unnecessary and uncalled for, for the purposes of self-amusement. Always has a victim, often oneself. In order for something to be a genuine Castaldo, the thought process behind it must be made immediately before the act, but in a form of retroactive hypothesis. The idea is that before you perform a Castaldo, you think about how amusing it will be in retrospect, as opposed to how irresponsible and dangerous it is in the immediate future. Origin; Italian-American - New Jersey.
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