The practice of behaving and operating on Wikipedia as if the statements and opinions of Jimbo Wales was equivalent to Wikipedia policy, especially in the face of lack of consensus or even opposing consensus.
"Jimbo doesn't like userboxes. They should be deleted."
"Jimbo deleted it. It may not be undeleted."
-examples of jimboism
The practice of restricting users from participation in an online Wikipedia discussion on the basis of their making an unpopular comment rather than on the basis of harboring motives such as may be attributed to sexual offenders and predators or unregistered foreign agents.
Jimboism is the reason the Wikipedia blocked you from editing on it's site.