The act of getting so into the beat and feel of a song by Mumford And Sons you without knowing start to stomp your foot to the beat and swing you air guitar like M&S Frontman Marcus Mumford
Guy1: "Your listening to "The Cave" by M&S!"

Guy2: "Uh yeah, big deal"....( Song progesses, and Guy 1 begins doing the Mumford Stomp)
"Uh... What the hell are you doing?"

Guy1: "Oh, I got lost in the song, I was doing the Mumford Stomp! :D"

Guy2:"...... your freaking weird."
by MumfordRockMysocksoff August 1, 2011
Get the Mumford Stomp mug.