bonkers

adj. Informal
Crazy: "When word spread that free gas was to be found, the populace, as expected, went bonkers" (Washington Post).

[Origin unknown.]

adjective

Afflicted with or exhibiting irrationality and mental unsoundness: brainsick, crazy, daft, demented, disordered, distraught, dotty, insane, lunatic, mad, maniac, maniacal, mentally ill, moonstruck, off, touched, unbalanced, unsound, wrong. Informal cracked, daffy, gaga, loony. Slang bananas, batty, buggy, cuckoo, fruity, loco, nuts, nutty, screwy, wacky. Chiefly British crackers. Law non compos mentis. Idioms: around the bend, crazy as a loon, mad as a hatter, not all there, nutty as a fruitcake, offout ofone's head, off one's rocker, of unsound mind, out of one's mind, sick in the head, stark raving mad. See sane/insane.

Note: click on a word meaning below to see its connections and related words.

The adjective has one meaning:

Meaning #1: informal or slang terms for mentally irregular
  Synonyms: balmy, barmy, bats, batty, buggy, cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, whacky

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Dansk (Danish)
adj. - skør, tosset, til en side

Nederlands (Dutch)
stapelgek, malend

Français (French)
adj. - dingue

Deutsch (German)
adj. - übergeschnappt

Ελληνική (Greek)
adj. - (καθομ.) βλαμμένος, παλαβιάρης

Italiano (Italian)
matto da legare

Português (Portuguese)
adj. - maluco (gír.)

Русский (Russian)
чокнутый

Español (Spanish)
adj. - loco de atar, chiflado, tonto de capirote

Svenska (Swedish)
adj. - helgalen, snurrig

中文（简体）(Chinese (Simplified))
疯狂的, 精神不正常的

中文（繁體）(Chinese (Traditional))
adj. - 瘋狂的, 精神不正常的

한국어 (Korean)
adj. - 술 취한, 정신이 돈

日本語 (Japanese)
adj. - 狂気の, 気が狂って

العربيه (Arabic)
‏(صفه) مجنون‏

עברית (Hebrew)
adj. - ‮מטורף, משוגע‬

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