Other forms: lumberingly; lumberings
Someone who's lumbering moves in a heavy, ungainly way. The big, lumbering players on a football team tend to play defensive positions like lineman.
You might normally skip lightly down the street, but when you're carrying two big suitcases and wearing a heavy backpack, you'll be a lumbering figure slowly making your way along the sidewalk. Your toy poodle might move easily, while your giant 150-pound Mastiff is a lumbering, drooling companion. This adjective comes from the verb lumber, from the earlier lomere, which has a Scandinavian root.