1 definition by broniesinarms

Top Definition
The unoffical rule of the internet that states, if it exists, there are ponies of it.

It is the pony form of rule 34, that states: if it exists, there is porn of it.
Brony 1: have you read the new starcraft crossover fanfic on equestria?
Brony 2: Wait, theres a starcraft/MLP crossover story?
Brony 1: Yeah, Rule P, makes it happen dude.
by broniesinarms June 29, 2011

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