Battlerager

A Dwarven Prestige Class, members of this elite order enter a raging frenzy. Usually covered in scars, runes and tattoos, they will scream out battle cries and religious oaths as they charge recklessly forward into battle. They live in the fringes of Dwarven society, kept away from children for there strange ways; heroic stories are told about them, but the Battlerager is short lived, having full belief that if they die, the Dwarven gods of battle will bring them back stronger than before.

The word for Battlerager in Dwarven literally translates into "Axe Idiot", for the crazed sort of fighting style that these Dwarves have, swinging axes, maces, hammers or fists recklessly into battle. Different "guilds" of Battleragers - such as the infamous Gutbusters - collectively use only one style of fighting (theres being spiked armor and gauntlets)

Famous Battleragers include Thibbledorf Pwent

Source
Races of Faerun