Any musical artist whos music is unbelievably loud or noisy - Examples can be hardcore emo bands such as Converge or Circle Takes the Square and British Gabber artist Syntax.
(Taken from the Syntax song 'Noise Terrorists':
'Make no mistake, raise up your fist
Open your ears for the noise terrorists'
'Make no mistake, raise up your fist
Open your ears for the noise terrorists'
by PUNK IS DEAD. November 7, 2005