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1 definition by The Sexy Sax Trololo Guy

 
1.
RPJ
Rocket Propelled Jacob, a very powerful gun that shoots out Jacobs on various occasions; Any Jacob may work, preferably a kid who dances, and frequently gets shot from an RPG.
The military just issued a thousand RPJ's from Jacob down the street.
by The Sexy Sax Trololo Guy May 29, 2011