1.
none of your business; unwanted meddling
An expression used to reject unsolicited advice or interference, telling someone their concern or help is unnecessary and unwelcome.
余計なお世話だよ。
That's none of your business.
A very common expression meaning "mind your own business" or "I didn't ask for your advice." Composed of 余計な (unnecessary, extra) + お世話 (care, help — with honorific お used somewhat ironically). Can be used bluntly to shut down unwanted advice, or softened as a disclaimer before offering advice oneself.
Usage
- Blunt rejection: 「余計なお世話だ！」 (That's none of your business!)
- Softened disclaimer: 「余計なお世話かもしれませんが…」 (This might be unwelcome, but...)
Common patterns
- 余計なお世話だ: that's none of your business (direct)
- 余計なお世話かもしれないけど: it might be unwelcome but...
- 大きなお世話: big unwanted meddling (emphatic variant)
Register
The blunt form is informal and can sound quite rude. The softened version (余計なお世話かもしれませんが) is commonly used as a polite preface when giving advice that might be unwelcome.