refusenik

noun2

1. •
   (historical) One of the citizens of the former Soviet Union who was refused permission to emigrate (typically but not exclusively a Jewish citizen denied permission to immigrate to Israel).

   • The refuseniki say they don’t want to change anything in the U.S.S.R., only leave it. — 1985
2. •
   (informal) A person who refuses to do something, usually as a protest; for example, one who refuses conscription or vaccination.