A more thorough explanation:

Definition: Sponsio ludicra is a Latin term that means "a laughable promise." It has two meanings:

1. Civil law: An informal or illegal agreement that cannot be enforced by law.
2. Scots law: An obligation that a court will not enforce because it does not concern a worthy subject, such as a gambling agreement.

For example, if two people make a bet on a sports game, it is a sponsio ludicra because it is not a legal agreement. The court will not enforce it because it is not a worthy subject.

Another example is if someone promises to give their friend a million dollars if they can jump over a building. This is also a sponsio ludicra because it is not a legal agreement and cannot be enforced by law.