phrasal
also shove one's oar in or stick one's oar in
: to offer usually unwanted advice or assistance : take part in another's affairs usually without being asked or wanted : be meddlesome : interfere
had to put their oar in all the time — Robert Westerby
was trying to stick his oar in — J.G.Cozzens
wasn't afraid to shove in his oar now and again — Elizabeth Goudge