also: どやつ
Rude or rough masculine pronoun for 'who'. Used in blunt questions or insults, often with a confrontational tone. Not appropriate in polite conversation.
Who the hell said that?
Who the hell are you?
Standard kana spelling; the word is usually written in kana.
Rare kanji form; it is rarely used.
Rare alternate reading; may be encountered in older or dialectal speech.
Derived from ど (interrogative prefix) + 奴 (やつ, 'guy, fellow'), with sound change from どやつ to どいつ. The exact historical derivation is uncertain, but it has long been used as a rough interrogative pronoun.