put your oar in

The phrase "put your oar in" is an idiomatic expression that means to interject or offer one's opinion or advice in a situation, often without being asked for or without having the necessary expertise. It implies interfering or meddling in a matter that does not directly concern oneself. The phrase originates from rowing, where putting one's oar into the water when it is not necessary can disrupt the rhythm and coordination of the rowing team.