meddler (plural meddlers)
- One who meddles or interferes in something not of their concern.
- 1759: Adam Smith, The theory of moral sentiments 
- The prudent man is not willing to subject himself to any responsibility which his duty does not impose upon him. He is not a bustler in business where he has no concern; is not a meddler in other people"s affairs; is not a professed counsellor or adviser, who obtrudes his advice where nobody is asking it.
- 1868: Horatio Alger, Struggling Upward 
- "Yes, Mr. Coleman, I have," answered Luke steadily. "I thought it my duty to inform this man of your character. I have advised him to put his money into a savings-bank."
- "Curse you for an impertinent meddler!" said Coleman wrathfully. "I"ll get even with you for this!"
- "You can do as you please," said Luke calmly.
- 1934: H. P. Lovecraft, Through the Gates of the Silver Key 
- "Stop!" The hoarse, oddly alien voice of the Swami held a tone beyond all mere earthly fright "I told you there was another form of proof which I could give if necessary, and I warned you not to provoke me to it. This red-faced old meddler is right; I"m not really an East Indian. This face is a mask, and what it covers is not human.
- 1759: Adam Smith, The theory of moral sentiments