did something for someone; did something to someone (often with a sense of doing them a favor or asserting oneself)
→ 為る
phraseUncommon#12,291
did something for someone; did something to someone (often with a sense of doing them a favor or asserting oneself)The expression can sound boastful, condescending, or triumphant depending on context. It is informal and combines the te-form of a verb with やった, the past form of やる.