The term "poor-mouthed" refers to someone who is constantly complaining about their financial situation or portraying themselves as destitute. Antonyms for this phrase could include "wealthy," "prosperous," "affluent," "well-off," or "rich." These words all describe individuals who have an abundance of financial resources and are not in need of assistance or support. In contrast to those who are "poor-mouthed," these individuals are likely to display a more positive outlook on their financial situation and may even be seen as boasting about their success. Overall, these antonyms provide a stark contrast to the idea of being "poor-mouthed" and suggest a more positive, prosperous state.