From Longman Dictionary of Contemporary Englishput/stick/get your oar input/stick/get your oar inBritish English informalINTERFERE to get involved in a conversation or situation when the other people do not want you to We were getting along fine until you stuck your oar in. → oar
Examples from the Corpus
put/stick/get your oar in• I heard him mention something about organs to another guest so I put my oar in and started such a nice conversation.• She was talking to me just now, before you put your oar in.• We were sorting it out quite nicely until you stuck your oar in. 