rob Peter to pay Paul

It means giving up one asset that you need to obtain another asset that you need; thus in gaining the second asset you lose the first asset and are no better off.

People who spend more money than they have are always in debt. Frequently instead of spending less, they borrow money (or "appropriate money"--"borrow without asking") from one source to pay another.

for example you have the money for rent but no money for groceries - so you use the rent money to buy the groceries. Now you have no rent.

Thanks
I think it's very interesting,and thank you for your help.Thankyou!