The term "manual labor" refers to physical work that is done by hand or with simple tools. It involves using one's muscles and energy to perform tasks such as digging, lifting, carrying, or operating machinery. This type of work typically requires a high level of strength, endurance, and coordination, and may involve repetitive movements or strenuous physical activity. Examples of manual labor include construction work, farming, factory assembly line jobs, and many other types of physically demanding tasks.