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From うん (un, the sound made when straining) +‎ (ko, diminutive nominalizer).[1][2]



うんこ (katakana ウンコ, rōmaji unko)

  1. (childish) poop, doo-doo

Usage notesEdit

  • This is an example of a word that can be spelled with katakana to convey an informal conversational tone, as ウンコ.
  • An informal and somewhat childish word; compare the more formal 大便 (daiben).
  • While うんこ (unko) is sometimes given as a literal translation of English interjection shit! as an expression of displeasure, this is inaccurate, as unko! sounds more like someone saying “Oh turd!” or “Oh doo-doo!” in English. Rather, the vulgar くそ (kuso, shit, excrement) or the less vulgar ちぇ (che, onomatopoeic interjection of displeasure) may be used, while the most common expression of displeasure is しまった (shimatta, oops, uh-oh, usually when it is one's own fault).


うんこする (rōmaji unko)

  1. (childish) to poop, to poo, to go number two


See alsoEdit


  1. ^ 1988, 国語大辞典(新装版) (Kokugo Dai Jiten, Revised Edition) (in Japanese), Tōkyō: Shogakukan
  2. 2.0 2.1 2006, 大辞林 (Daijirin), Third Edition (in Japanese), Tōkyō: Sanseidō, ISBN 4-385-13905-9