- Out of control with anger or excitement; wild or frenzied: a man went berserk with an arsenal of gunsMore example sentences
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, hyperBritish • informal spare, crackersNorth American • informal postalAustralian/New Zealand • informal crook• vulgar slang apeshit
- 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.
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).