Put in your two pennyworth/penn'orth - Idioms by The Free Dictionary
put in your two pennyworth/penn'orth
put in (one's) two pennyworth
To share one's opinion, idea, or point of view, regardless of whether or not others want to hear it. ("Pennyworth" is a contraction of "pennies' worth.") Primarily heard in UK. Jeff always has to put in his two pennyworth, even when it's clear he knows nothing about what's being discussed. If I can just put in my two pennyworth, I think the staff would really appreciate a bump in their pay, and productivity would increase as a result.
put in your two ˈpennyworth/ˈpenn’orth (British English) (American English put in your two ˈcents’ worth) (informal) give your opinion about something, even if other people do not want to hear it: I expect you’ve already made up your mind, but I’ll put in my two pennyworth anyway. ♢ The public will get a chance to put in their two cents’ worth at a public hearing.