1. A phone call, page or conversation based on wanting money or wanting to borrow money, especially for the wrong reasons.
2. A phone call, page or conversation made to a person where the only goal is to get money.
3. The act/art of communicating with someone to get money.
4. The act/art of persuading to obtain money; solicit.
An example of who makes a money call is a bill collector.
When you know all a person wants is your money, all they is is a money call.