Put your money where your mouth is This is a challenge to someone who makes bold claims. It suggests that you don't believe them or that you doubt the strength of their convictions, and they need to prove what they claim. Read the riot act To reprimand someone, usually for being unruly. This refers to the eighteenth-century British law that required people to disperse when they gathered illegally. Rumor-mongering An unproven or untrue claim or piece of information about someone.
People often use use rumors to damage someone else's reputation.
Run it up the flagpole and see who salutes Make a suggestion and see who likes it. Shoot the breeze To talk casually. To talk without thinking through what you are saying. Up on a soapbox Freely expressing personal opinions. In the past, on of the ways someone could address a crowd was to stand on a crate, or, in the case of this phrase, a soapbox.