Is the following expression correct?
"don't stick your oar in" meaning: "mind your own business"
put/stick oar in - Idioms - by the Free Dictionary, Thesaurus and Encyclopedia.
put/stick your oar in (British & Australian, informal)
to involve yourself in a discussion or a situation when other people do not want you to.
Ex: I don't want Janet coming to the meeting and sticking her oar in - she knows nothing about the situation.