<p><strong>Adjective</strong></p><ul><li>Violently or destructively frenzied; wild; crazed; deranged: He suddenly went berserk.</li></ul><p><strong>Noun</strong></p><ul><li>(sometimes initial capital letter) Scandinavian Legend: Also berserker. An ancient Norse warrior who fought with frenzied rage in battle, possibly induced by eating hallucinogenic mushrooms.</li></ul><p><strong>End of Response</strong></p>