A second-class citizen is a person who is systematically discriminated against within a state or other political jurisdiction, despite their nominal status as a citizen or legal resident there.

What does it mean to be called a Second-Class Citizen?

: someone who is not given the same rights as other people I've been treated like a second-class citizen.

What is a second class person?

noun. a citizen, especially a member of a minority group, who is denied the social, political, and economic benefits of citizenship. a person who is not accorded a fair share of respect, recognition, or consideration: The boss treats us all like second-class citizens.