put/stick your oar in

put (one's) oar in(to) (something)

1. To offer or express one's opinion (on some matter), even though it was not asked for or desired. I don't know why you feel you have to put your oar into every dispute Terry and I are having. The members of the board are perfectly capable of arriving at a decision of their own accord, so I'll thank you for not putting your oar in, Tom.
2. To involve oneself in an intrusive or nosy manner into something that is not one's business or responsibility. I wish my neighbors would quit putting their oars in and just leave us alone! Liam, don't put your oar into your brother's affairs—he can manage well enough on his own.
See also: oar, put

stick (or poke or put or shove) your oar in

give an opinion or advice without being asked. informal
1992 Daily Telegraph My only minor fault is I sometimes like putting my oar in…and my advice can be a little brutal.
See also: oar, stick

put/stick your ˈoar in

(British English, informal) interfere in the affairs of other people: This project is nothing to do with Dave. Why does he keep trying to stick his oar in all the time?
See also: oar, put, stick