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
If someone’s got melon, it means they’re smart. The expression most likely arose because of the resemblance between a melon and a human head. Several other foods are associated with having brains, including a cabbage, a gourd, and even a...
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...