One of a class of legendary heroes, who fought frenzied by intoxicating liquors, and naked, regardless of wounds.
- Destructively or frenetically violent: a berserk worker who started smashing all the windows.
- Mentally or emotionally upset; deranged: berserk with grief.
- Informal Unrestrained, as with enthusiasm or appetite; wild: berserk over chocolates.
- One that is violent, upset, or unrestrained.
- A berserker.