A crazed Norse warrior who fought in a frenzy.(noun)
Injuriously, maniacally, or furiously violent or out of control.(adjective)
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Use "beserk" in a sentence
"Moreover, the word "amok" has anthropological grounding with various accounts of lonely, frustrated and disturbed men who have suffered loss going beserk, running amok (a Malay word) and randomly killing people (see Steven Pinker How The Mind Works, 1997)."
"The entire population of this country needs to be educated and to understand that they can be part of the solution, and that their greedy, self-centered behavior in insisting on driving everywhere in gas-guzzling vehicles, eating huge quantities of meat, and participating in a consumer society gone beserk is one of the main causes of global warming."
"It was afterwards alleged by the IFP that policemen involved had gone "beserk", had acted "excessively and regarded the lives of black Africans as cheap"."