Final answer:
The expression that applies to derogatory words such as "darky", "honky", or "frog" is ethnophaulism, which is a form of prejudice and discrimination that perpetuates negative stereotypes.
Step-by-step explanation:
The term that applies to expressions such as "darky", "honky", or "frog" is ethnophaulism. These are derogatory words used to describe or name people based on their ethnicity or race. Ethnophaulisms are a form of prejudice and discrimination, and they contribute to negative attitudes and beliefs among different ethnic or racial groups.
Stereotypes are oversimplified generalizations about groups of people. While they can be positive, more often they are negative and do not account for individual differences within those groups. Using ethnophaulisms perpetuates stereotypes and supports a culture of prejudice, which may be further entrenched by institutional racism and prejudiced actions within society.