Also used to describe a team or players performance, showing complete domination of the opposing side. True fans may even own multiple pieces of brightly colored clothing with the phrase "mow em down" proudly displayed.
Basically a huge motivation to one's teamates, regardless of the game, to hear MowEmDown. Rumor has it that American troops were heard yelling MOW-EM-DOWN while storming the beach at Normandy and the Battle of Bull Run.
"Did you see Tiger play the other day?"
"Yeah man he went ham and Mowed Down the whole field"