texting, tweeting, blogging, emailing, gaming or other online pursuits from a wireless device while on the toilet. particularly heinous if one skypes while taking a dump.
JD is a pig. He was browncasting WOW from a turnpike rest stop because he had the runs and decided to take a poo break.
Deriving from the words 'Brown' and 'Elevating', Brownevating is to throw a Shitnade into an elevator (preferably packed with people) just as the doors are beginning to close. The resulting detonation of the Shitnade leads to the interior of the elevator, and all those using it, to be covered in the colour brown.
"I heard Jim was fired for Brownevating the elevator to the finance department!"