Wiktionary
nutrider
n. 1 (context slang derogatory English) An individual whose force of argument derives from the notoriety or skill of some group or person they are associated with. 2 (context slang English) A person with any particularly vociferous or enthusiastic stance. 3 (context Internet slang derogatory English) An online fan and defender of the reputation of a person, group, brand, or product.