Top Definition
A combination of both Murphy's Law and Megan's Law, this is the theory that anything that can possibly go wrong in the course of a sexual relationship with a minor (or person significantly younger), will.
Not once taking Janis's Law into consideration, the cougar never learned her lesson despite having been chased down by angry parents wielding sawed-off shotguns on multiple occasions.
by k-rex September 19, 2007
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