Definition of berserk in English:

berserk

Line breaks: ber|serk
Pronunciation: /bəˈzəːk
 
, -s-/

adjective

Out of control with anger or excitement; wild or frenzied: a man went berserk with an arsenal of guns
More example sentences
  • After the match a section of the spectators went berserk and pandemonium raged.
  • A drunken holidaymaker who went berserk on a plane during a fit of air rage was today beginning a two-year jail sentence.
  • They went berserk, insane when the prices fell.
Synonyms
mad, crazy, insane, out of one's mind, hysterical, beside oneself, frenzied, crazed, demented, maniacal, manic, frantic, wound up, worked up, raving, wild; enraged, raging, out of control, uncontrollable, amok, on the rampage
informal off one's head, up the wall, through the roof, off the deep end, ape, bananas, bonkers, mental, barmy, nutty, nuts, bats, batty, hyper
British informal spare, crackers
North American informal postal
Australian/New Zealand informal crook
vulgar slang apeshit

Origin

early 19th century (originally as a noun denoting an ancient Norse warrior who fought with wild or uncontrolled ferocity): from Old Norse berserkr (noun), probably from birn-, bjorn (see bear2) + serkr 'coat', but also possibly from berr 'bare' (i.e. without armour).

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