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RCBP is an acronym that stands for Read Comments Before Posting. It is used when someone repeats something others have already said in a thread. It is especially appropriate when someone makes a joke that was already made, but wasn't terribly funny in the first place.
Jed: Is that baby smiling because she's happy, or is it just gas? ololololol

Ned: Dude, like 5 other people have already said that. RCBP!
by Iris Ablaze September 19, 2011
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