The definition of a blank check refers to something that has no limits such as a bank check that you can fill any amount in on, or it may refer to simply being unconstrained by financial limitations, by rules or regulations.
(noun)
- An example of a blank check is a person who is given an unlimited allowance by her parents or whose parents give her a check and let her write down any amount she wants on it to get cash.
- An example is someone whose parents let him do whatever he wants. He may be said to have a blank check to behave as he wishes.