Rumpackage Share definition Flag A word to be blurted out during awkward situations or over the phone to replace a 'hello'. Man, i was sitting in study hall the most boring class of the day and some kid just walked in calmly and yelled "Rumpackage!" Rumpackage by Rumpackage March 20, 2011 0 0 Get merch Get the Rumpackage mug. Buy Now — $32.95 See more merch