1. ancient Norse warriors who fought in a wild, frenzied state
Usage: historical
2. people who behave in an extremely wild or violent manner
Usage: informal

Examples

• The berserkers were feared throughout medieval Scandinavia for their fierce fighting style.
• Ancient sagas tell stories of berserkers who could not feel pain in battle.
• The protesters went completely berserk, acting like berserkers in the streets.
• He described the angry mob as a group of berserkers destroying everything in their path.
• The berserkers were said to wear bear or wolf skins into combat.
• When the team lost, some fans became berserkers, overturning cars and breaking windows.