A play on "nimrod", describing an idiot (most likely a 4th-8th grader) who's only topic of conversation is Call Of Duty. They talk so much about frickin' "360 no-scopes" that they might get boners if they frickin' had dicks. the NimCODs talk all frickin day and make you want to take on of their own machine guns and shoot their mouths off before they cum into each other.
6th grader #1: HEY DUDE Youu no I just fuckin changed mah GAMER TAG
6th grader #2: OMG GUD THING 2. YUR OLD ONE WAS SOO L4ME BROSK1
6th grader #1: R0TFLM4O NO IT WAS nt DUDE, YOURZZ IS
6th grader #2: you no dis dude got a 360 no scope
6th grader #1: NOW WAY BRO! I KNOW ONLY 13 ODDUR PPL WHO DID ITTT. DAAAMMN.
You: SHUT THE HELL UP AND GET A LIFE INSTEAD OF USING YOUR DISTORTED BRAIN CELLS TO ACT COOL AND FRIGGIN MURDERING OTHER PEOPLE'S MINDS AND EAR DRUMS!!!!!!!!!!!!! *what nimCODs*