to put your money where your mounth is

[readytolearn]

Somebody could help me with this, please?

 

[tottallyoff]

Stand by your convictions. Prove what you are a man of your word. Not to back down from a fight. etc, etc, etc

 

[readytolearn]

to be a man of honour?

 

[Thomas Tompion]

Stand by your convictions. Prove what you are a man of your word. Not to back down from a fight. etc, etc, etc

It means this and, in a less figurative sense, to be willing to put up money to support a view, either in a bet, or to help finance a project.

 

[readytolearn]

Thank you all!

 

[tottallyoff]

to be a man of honour?

never seen it in this context.