/jranger
Overview
/jranger is a meme meaning no. JRanger was a poster on the Official City of Heroes/ Villains forum who would reply to ideas on the Suggestions and Ideas forum by only stating "no" without further explanation.
Instead of saying "no", users started replying to posts by simply saying "/jranger" instead (the first instance being Memphis_Bill 9/21/07, since deleted). Both actions were ultimately made actionable and "bannable" by Ex Libris [1]. Although it ultimately led to JRanger being banned from the Official City of Heroes/ Villains forum, the usage still sees some use on the PWNZ forums and at least once by a developer[2] after this rule was placed.
References
JRanger's City of Heroes Official Forums account
Ex Libris, post: Notification to the Community!
Back Alley Brawler, post: Re: Change the Hasten effect