‘Go on’ has a lot of meanings in dictionaries, which makes me confused. What’s the omitted words and meanings of ‘go on’ in the following scene?
(They are gambling on a sport in the magical world.)
”I’ve already got Roddy Pontner betting me Bulgaria will score first – I offered him nice odds, considering Ireland’s front three are the strongest I’ve seen in years – and little Agatha Timms has put up half shares in her eel farm on a week-long match.”
”Oh … go on then,” said Mr. Weasley. “Let’s see … a Galleon on Ireland to win?”
(Harry Potter 4 [US Version]: p.88)