The term "poor mouthed" refers to someone who constantly complains about not having enough money or resources. The opposite of this can be described in several ways, including financially secure, affluent, or prosperous. These antonyms suggest a person who has enough money to meet their needs, and possibly even luxuries. At the same time, someone who is not "poor mouthed" may also be humble and grateful for what they have. They may be content with a modest lifestyle, and not feel the need to constantly show off their wealth. Regardless of someone's financial situation, it's important not to judge or stereotype them based on how much money they have.