To get stabbed, sliced, chopped (to bits, obviously), slashed or otherwise involuntarily come into contact with the business end of an edged tool (e.g. a knife, ax, katana, razor blade etc.) to the point of being rendered no longer a nuisance or, ya know, alive.

Stemmed from the Spyderco Lum folding knife designed by Bob Lum, and the British slang term "lumped up."

When you eat dirt for the first time and leave your family to build a shack in the woods