thinko

T1H4I1N1K5O1
/θɪŋkəʊ/

noun

A careless mistake made in thinking.

“I must have done quite a thinko, but I don't remember leaving my keys in the refrigerator.”

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Meanings

nounthinko (plural thinkos)

plural thinkos

  1. slangA careless mistake made in thinking.

    I must have done quite a thinko, but I don't remember leaving my keys in the refrigerator.

    4 more examples

    1998, K. G. Binmore, Game Theory and the Social Contract, Volume 2: Just Playing, page 34, We need to face the fact that thinkos are likely to be much more important, even though such a source of noise is much harder to model.

    Spell-checkers can help with simple types such as misspeIIings and repeated words, but they are little defense against the equally common "thinkos," such as the inconvenience/incontinence example above. Your only defense against thinkos is a careful read.

    2006, Kristen B. Donohue, “Misused Words and Other Witing Gaffes: A Manager's Primer”, in Written Communications that Inform and Influence, Harvard Business School, page 164

    I don't know about you, but I don't want to grovel through a bunch of code blocks to track down a typo or thinko.

    2008, Kurt Wall, Tcl and Tk Programming for the Absolute Beginner, page 134

    There are two kinds of linguistic missteps, the typos and the thinkos. Typos are the processing glitches that intercede between a thought and its expression. They can make you look foolish, but they aren't really the signs of an intellectual or ethical deficiency, the way thinkos are.

    2009, Geoff Nunberg, Going Nucular: Language, Politics, and Culture in Confrontational Times, page 59

    Synonyms: brain fart

verbthinko (third-person singular simple present thinkos, present participle thinkoing, simple past and past participle thinkoed or thinko'd)

present singular third person thinkos · participle present thinkoing · participle past thinkoed · past thinkoed · participle past thinko'd · past thinko'd

  1. intransitiveslangtransitiveTo make a mistake when thinking.

Synonyms & antonyms

nounA careless mistake made in thinking.

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Origin

From think + -o, on the model of typo (“typographical error”).

Full word history & related roots →

Rhymes & wordplay

Rhymes with thinko

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Anagrams

Cite this entry
APA

thinko. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/thinko

MLA

“thinko.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/thinko. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “thinko,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/thinko.

Source: thinko on Wiktionary, CC BY-SA 4.0.