A more thorough explanation:

Definition: A legal term used to describe a feigned or false action brought for an illegal purpose on a pretended right.

Example: A person who files a lawsuit against their neighbor for damages caused by a tree falling on their property, even though they know the tree was healthy and did not cause any damage, is engaging in a faint action.

This term is used to describe a legal action that is brought with the intention of deceiving the court or gaining an unfair advantage. The example illustrates how someone can use a faint action to try and gain compensation for something that they know they are not entitled to.