Crowbar is an American sludge metal band formed in New Orleans, Louisiana, in 1990. Through infusing a slow, low-keyed, brooding doom metal sound with the aggression of hardcore punk, they pioneered a style known as sludge metal – albeit frontman Kirk Windstein admitted a mild dislike to the term – alongside other bands of the New Orleans heavy metal scene such as Eyehategod, Soilent Green, Acid Bath, and Down.