Put your money where your mouth is!

put (one's) money where (one's) mouth is

To do, live up to, or follow through on something one talks about, threatens, or promises, especially (but not always) when it involves spending money. Fans who have been demanding a sequel for the last decade had better put their money where their mouth is and go buy a ticket! He promised to lower taxes if he got elected. Now let's see if he'll put his money where his mouth is.
See also: money, mouth, put
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

Put your money where your mouth is!

Inf. Stop just talking and stake your own money! (From gambling. Can also be said to someone giving investment advice.) You want me to bet on that horse? Did you? Why don't you put your money where your mouth is? If this is such a good stock, you buy it. Put your money where your mouth is!
See also: money, mouth, put
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

Put your money where your mouth is!

exclam. Stop talking big and make a bet! (From gambling. Can also be said to someone giving investment advice.) You want me to bet on that horse? Did you? Why don’t you put your money where your mouth is?
See also: money, mouth, put
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.

put (one's) money where (one's) mouth is

Slang
To live up to one's words; act according to one's own advice.
See also: money, mouth, put
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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