redneck /red.nek/ noun [ C ] mainly US informal
a poor white person without education, especially one living in the countryside in the southern US, who has prejudiced (= unfair and unreasonable) ideas and beliefs
Some synonyms =>
sense 1) caipira/simplório/rude/rústico etc
sense 2) obstinado/teimoso/quadrado/obsoleto/arcaico/ultrapassado
Generally pejorative, at least 99.99% of the times.