one who plays the call of duty game franchise and arms Oimself to the teeth, usually with explosives. Although Mobile Artillery Batteries are most often noobs that are 12 years old in real life, the more experienced ones can be useful for eliminating enemy groupings or clearing rooms. much like an Armchair AA except MABs tend to fucus more on ground based threats
Jimmy: dude, look at that nooby Mobile Artillery Battery (MAB) i just sniped, hahahah
Jimmy: That mab just killed me with his noob tube...and two of my friends too, omg pro MAB!