That reminds me of another banking joke, also with a person named Paddy.
There was once a bank clerk, his name was Paddington Whack, but everyone called him Paddy. Anyway, one day, a frog walked into the bank. He went up to Paddy and said "Kid, I would like to have a loan."
Paddy looked shocked and said "But you're a frog!"
"Yes, I am." said the frog "My name's Kermit Jagger, son of Mick Jagger, and I must give you this." Kermit pulled a small elephant made from China out of his pocket.
"What's this?" asked Paddy.
"It's my security," said Kermit. He sighed. "Look, just speak to your manager, okay?" Paddy walked into the back room and talked to his manager.
"Um...boss," said Paddy "I've got a bit of a problem. A frog has walked in, said he's the son of Mick Jagger and demanded a loan. He also give me this." Paddy showed his manager the elephant "I mean, what the hell is this?" Paddy's manager stared at Paddy and said:
"It's a nick-nack,
Paddy Whack,
Give the frog a loan.
His old man's a Rolling Stone!"