Commonly found variants; note these may range from acceptable alternatives to non-standard forms or incorrect spellings*.
* Singlish is a largely spoken creole, and as such descriptivism (recording forms that reflect actual pronunciation in spoken language, or as appearing in the linguistic corpus) is more pertinent than strict prescriptivism. Nevertheless, the use of more standard forms (or for words originating in languages with Latin script, such as Malay, accurate to the original spelling) is recommended and encouraged.

also can:

adoh adoi adui

aduh

Malay:

aduh

expand for details Detailed etymology

definitions

interjection

  1. ouch!; an exclamation in response to physical pain, or sympathy to another's pain, or expressing emotional hurt as a reply to an insult.
  2. synonyms:

  3. a general exclamation of disapproval, consternation, disbelief, surprise, etc.
  4. “Adoooi,” the cabbie shook his head, as he pulled out of the lane. “Nowadays, the children ah!” ... “Saturday night, adoi! My cab can be like tiger show, you know? Some of the girls wear dental floss only!”

    — 2008 December 28, Colin Goh. The Sunday Times (LifeStyle), p.11