Fabian bet
A dirty deal where one person can't be scammed but might get a nice prize
I bet my friend that I'd win the race. He can't lose his $10, but he might get a new toy.
My brother and I had a Fabian bet. He can't lose his favorite snack, but he might get a new one.
My dad and I made a Fabian bet. He can't lose his watch, but he might get a new one.