Used to imply a person is gullible.
Taken from a scene in The Simpsons where a
tough tells three nerds he is the
Wallet Inspector and they hand over their wallets unthinkingly.
Boris
Johnson: I'll get a good deal for workers.
Caroline Flint, Labour
MP: Okay. I'll vote for it!
Everyone: Caroline's meeting with the Wallet Inspector is going
well.