DOLLARS IN THE TEETH 3D PRINT MODELThis model is HI POLY and suitable for 3D Print or CNC machine carving.This model has no textures.

Origin of the Phrase

According to Christine Ammer, The Facts on File Dictionary of Clichés, second edition (2006), the phrase has been around in the United States since approximately 1930:

put one's money where one's mouth is Back up your stated position with action. This term, according to Eric Partridge's informants, was current in the United States from at least 1930 and caught on in Great Britain and other English-speaking countries shortly after Wold War II. In 1975 the British government used it as an advertising slogan to persuade people to invest their savings in the National Savings Bank Accounts Department.

As recently as Eric Partridge, A Dictionary of Slang and Unconventional English, eighth edition (1984), however, Partridge's informants had not pushed the coinage date earlier than 1945:

put your money where your mouth is! Back your words with cash (cf. the orig., U.S. sense of put up or shut up!); since ca. 1945.

Early Occurrences Found in a Google Books Search

A Google Books search turns up three pre-1930 matches for the phrase. From Howard Washingtom Odum, Rainbow Round My Shoulder: The Blue Trail of Black Ulysses (1928):

“How much you got to put in the game?”

“Five dollars.”

“Hell, that’s not enough.”

“You are a dam’ fool, how much you got?”

“I have ten dollars.

”Well, we can have a good game. Get the cards then and let’s meet the dam’ gang.”

“Deal the jack of di’mon’s, that’s my card.”

“Bet your money, go to hell.”

Put your money where your mouth is.

It is down, turn them dam' cards you have fell.