A more thorough explanation:

TRESPASS FOR MESNE PROFITS

Trespass for mesne profits is a legal action that is taken against a tenant who wrongfully occupies a property and receives profits during their occupation. This action is taken in addition to an action for ejectment, which is the legal process of removing a tenant from a property.

For example, if a tenant continues to occupy a property after their lease has expired and collects rent from subtenants, the landlord can take legal action against the tenant for trespass for mesne profits. The landlord can sue the tenant to recover the profits that were wrongfully received during the tenant's occupation.

Another example is if a person enters onto someone else's property without permission and starts a business, they can be sued for trespass for mesne profits. The property owner can take legal action to recover the profits that were made during the unauthorized use of their property.

These examples illustrate how trespass for mesne profits is used to recover profits that were wrongfully received during the occupation of a property without permission or legal right.