To advertise/endorse/support something heavily, usually to an irrational extent.
Examples being when people back something so much (style of martial arts, sports team) that they have to bring it up whenever possible and tell everybody how it's the best.
Stop being such a BJJ nutrider.
You nutriders won't accept anyone else's opinions.
someone who rides another person's nuts
to stalk, to idolize
Bigseph enjoys to ride on nuts