When counting out change for a customer buying tickets at his debt-ridden circus, Fields leads the customer to believe that he not only has counted out too much, but accidentally given him change for a 20 rather than a 10. The customer grabs the money and runs without bothering to point out the mistake. I think you can guess what actually happened.
This is really the only relevance of the title to a movie which is basically a series of skits showcasing W.C. Fields and Edgar Bergen, occasionally together, but usually in individual routines. Although W.C. is always a pleasure to watch, this is certainly not one of the better movies in which to do that. First of all, the Bergen routines grow tiresome quickly. There's only so much I can take of watching a ventriloquist who moves his lips while everyone pretends that his wooden dummies are alive. Second, Fields' routines never reach the level of inspired zaniness which his best films are able to achieve.
Finally, Fields never really imbues his character with any humanity until the final scenes. It his ability to do so which makes his best movies so special ("It's a Gift", "The Bank Dick", "You're Telling Me", etc.). Without it, all you have is a run-of-the-mill hit-or-miss comedy.