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1.
A word used to make fun and or annoy someone, such as Jeffrey, if you are pissed that they are beating you in COD. A ploomer is a dimwitted or annoying person, or someone who is generally getting on your nerves for whatever reason.
Guy 1: Ohhh take that! I just got a care package in cod!!
Guy 2: Wow... your such a PLOOMER!

Guy 1: *Knocks on door*.
Guy 2: *Opens door*
Guy 1: Hey, PLOOOMER!
by Zingbuh July 23, 2010