Waluigi

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/ˌwɑːluˈiːdʒi/

noun

An artificial intelligence that exhibits negative, chaotic traits because its developers trained it to avoid these very traits; the AI's Jungian shadow.

RareScrabble 11

Meanings

nounWaluigi (plural Waluigis)

plural Waluigis

  1. humorousslangartificial intelligenceAn artificial intelligence that exhibits negative, chaotic traits because its developers trained it to avoid these very traits; the AI's Jungian shadow.

    The attempt to produce Luigis is what also produces the Waluigis. Without this, we wouldn’t even have a knowable Nintendo-esque character, but rather a swirling Lovecraftian horror

    2024 July 5, Günseli Yalcinkaya, “Waluigi’s Purgatory: what happens when an AI cheats the system?”, in Dazed
    1 more example

    Luigi plays by the rules; Waluigi cheats and causes chaos. An AI was designed to find drugs for curing human diseases; an inverted version, its Waluigi, suggested molecules for over 40,000 chemical weapons. All the researchers had to do, as lead author Fabio Urbina explained in an interview, was give a high reward score to toxicity instead of penalizing it. They wanted to teach AI to avoid toxic drugs, but in doing so, implicitly taught the AI how to create them.

    2023 May 25, Nabeel S. Qureshi, “Waluigi, Carl Jung, and the Case for Moral AI”, in Wired

Origin

Blend of Japanese 悪い + English Luigi. Derived from the Super Mario character Waluigi.

Full word history & related roots →
Cite this entry
APA

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

MLA

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

Chicago

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

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