rumn'd Share definition Flag 1. an old tree stump of a tree that was cut down, but is still growing, preferably on a hummuck the old man sat on the rumn'd and scratched his head while looking at a map. rumn'd by grampatheftauto July 25, 2009 0 0 Get merch Get the rumn'd mug. Buy Now — $32.95 See more merch