lost one's marbles

A form of lose one's marbles — Synonym of lose one's mind (“to become crazy”).

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Meanings

verb
  1. participlepastsimple past and past participle of lose one's marbles
Cite this entry
APA

lost one's marbles. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/lost%20one's%20marbles

MLA

“lost one's marbles.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/lost%20one's%20marbles. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “lost one's marbles,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/lost%20one's%20marbles.

Source: lost one's marbles on Wiktionary, CC BY-SA 4.0.