Top Definition
1. Rule X is defined as the rule that is the answer to all "Why/how come questions". It states that To all Why questions the answer is X.

2. You do not question Rule X because the answer itself is rule X. Do not ask what the X stands because it is an unnesissary question. And rule X does not answer it.
Person A: Why are clouds blue?
Person B: Rule X, man.
by Exman33 April 19, 2010

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