If someone goes on hunger strike or goes on a hunger strike, they refuse to eat as a way of protesting about something. The protesters have been on hunger strike for 17 days + hunger striker hunger strikers hun·ger strik·er The five hunger strikers in London called off their strike and celebrated the good news. A voluntary fast undertaken as a means of protest, as by a prisoner.hunger striker n. a situation in which someone refuses to eat for a long time in order to protest about something