door-knocker
n.— «He said if that situation arises they will give them food and water and will leave a door knocker and hopefully the resident will come home and take care of the animal.» —in Wayne Gilley City Hall Council Chamber Lawton City Special Council Meeting (Lawton, Oklahoma) Apr. 10, 1997. (source: Double-Tongued Dictionary)
Further reading
The word filibuster has a long and colorful history, going back to the days when pirates roamed the high seas. Today it refers to hijacking a piece of legislation. Plus, the language of yoga teachers: When doing a guided meditation, you may hear...