galumph \guh-LUHM(P)F\ (intransitive verb) - To move in a clumsy manner or with a heavy tread.
"Then he climbed up the little iron ladder that led to the wharf's cap, placed me once more upon his shoulders and galumphed off again." -- Alistair MacLeod, Island
Galumph is probably an alteration of gallop. It was coined by Lewis Carroll in the nonsense poem "Jabberwocky."