A "rotten borough" refers to a parliamentary constituency with a tiny electorate that was controlled by a wealthy patron rather than the people. Not only was this practice corrupt, but it also denied the opportunity for fair representation in government. Today, the term is still used to refer to situations where democracy is undermined, particularly in the context of political gerrymandering. Synonyms for "rotten borough" include "closed shop constituency," "pocket borough," "nomination borough," or "pocket veto." These terms all refer to similar practices, where a small number of individuals hold undue influence over government decisions, often at the expense of the wider public interest.