I'm not sure if I've ever heard the word cadger. By recall:

The only fault I find with badgers
Is that they're such appalling cadgers.
If you have one in to dine
He'll ask a dozen of your wine
To take home. If he likes your prints
He'll drop the most unseemly hints:
"I say, who is this picture by?
It's my birthday next July."
Once one asked me for my car.
This was going rather far,
So I answsered, "Wouldn't you rather
Have this ring? It belonged to my father.
It's set in diamonds." Calm and bland,
He thanked me and held out his hand.
I had an apoplectic fit,
But the badger walked away with it.
--Christopher Isherwood