One who is prone to butting in; a meddler.
(slang) A person who is constantly butting in or meddling in the affairs of other people.
(informal, derisive) One who is prone to butt in, interrupt, or get involved where (s)he is not welcome.
I wish I had never met that nosy buttinsky!
Other Word Forms
Origin of buttinsky
- butt in -sky last syllable in many Slavic surnames
From American Heritage Dictionary of the English Language, 5th Edition