"Give me 5 cents and I’ll grant you a wish."
Ok.
"Thank you, what is your wish?"
I wish for my 5 cents back.
Listen here, dummy. The joke is that the dude asks for a wish, but instead of wishing for something cool like a mountain of honey, he just wants his darn nickel back. It's funny 'cause it's so stupid and unexpected. You probably spend your money on honey buns you fat slob.
Lol
Same