9 letters · 18 points in Scrabble
noun a meddler who tends to butt in
originFrom butt in (“to join a conversation or situation in which one is not welcome or invited, interject”) + -sky (a variant of -ski (suffix added to a word, name, or phrase to invoke Russianness, Polishness, or a more general Slavicness)), humorously modelled after Russian surnames, and originally and often used in the form of a surname.
Etymology from Wiktionary, CC BY-SA 3.0