to do something rather than to just talk about it I finally realized that I should stop complaining about the people who run our town, put my money where my mouth is, and run for office.
Usage notes: sometimes used in the form put its money where its mouth is: Congress needs to put its money where its mouth is and really support energy conservation.
to support something that you believe in, especially by giving money If people are really interested in helping the homeless they should put their money where their mouth is.