Vegetarianism is the practice of abstaining from the consumption of meat. Common reasons for adopting a flexitarian diet may be health, environment (see environmental vegetarianism) or reduction of resource consumption (see economic vegetarianism), which are also arguments in favor of adopting a fully vegetarian diet. While flexitarians may view the flexitarian diet as occasional indulgences, vegetarians may strongly resent the term and view it as cheating or as a moral lapse. Other than flexitarian diets that may include any type of meat, semi-vegetarianism includes:
Pollotarians: They eat chicken or other poultry, but not meat from mammals, often for environmental, health or food justice reasons.
Pescetarians: They eat fish or other seafood, but not poultry or red meat from mammals. The macrobiotic diet is plant-based, and may or may not include the occasional addition of fish or other seafood.
Pollo-pescetarians: They eat fish and poultry, but not red meat from mammals.