The Mongrel Complex is a term used to describe a type of prejudice and discrimination that some people have against people who have mixed heritage (meaning they are from two different cultures, or have parents from different cultures). This type of discrimination is based on the idea that people with mixed backgrounds are inferior to people with single backgrounds, mostly because the cultures are combined in some way and do not fit into any one cultural group. This type of discrimination is particularly common in places where there are more than two cultures present, as it is easier for people to notice the differences and make assumptions about someone's background. It can be seen in many forms, such as not allowing people with mixed backgrounds to join certain clubs or organizations, or not allowing them to be part of certain communities.