Defined, it means the genetic splicing of a grape and an orange, but it's importance comes from the oddness of saying the word.  It may be the funniest word to say out loud.
by gomer May 6, 2003
 Get the grorangemug.
Get the grorangemug. by Liane 742 April 22, 2006
 Get the grorangemug.
Get the grorangemug. by gabbynicole July 26, 2012
 Get the Grorangemug.
Get the Grorangemug.