To dump incorrectly, such as at the wrong place or time, or to dump something that should not have been dumped.
The buckets used in depositing concrete were faulty and a considerable loss of concrete was caused by misdumping.1908, United States. War Department, Annual Reports of the War Department - Volume 8, page 430:
He received one when he had an accident and bent the exhaust stack of his truck; he received another when he misdumped the wrong octane gasoline into a service station tank; he received a third for running over and breaking a gas hose; and he freceived a fourth for improperly making out an invoice.1974, United States. National Labor Relations Board ·, Decisions and Orders of the National Labor Relations Board, page 235:
1 more example
If the misinjected or misdumped beams make it past the IR3 and IR7 collimators, they can reach the experiments.2015 February, Marija Cauchi, R.W. Assmann, A. Bertarelli, F. Carra, L. Lari, A. Rossi, P. Mollicone, N. Sammut, “Thermomechanical assessment of the effects of a jaw-beam angle during beam impact on Large Hadron Collider collimators”, in Physical Review Accelerators and Beams, volume 18, number 2:
misdump
noun
/ˈmɪsdʌmp/
Etymology From mis- + dump.
1
An act of misdumping.
On September 3 the terminal manager spoke with the employer's president and told him that the last misdump was the driver's third mistake.1973, Labor Relations Reference Manual: The Law of Labor Relations, page 1657:
He confronted Mulkey with it and Mulkey, after checking over his books, acknowledged that he had copied a number incorrectly from the dispatch sheet and had made the misdump.1974, United States. National Labor Relations Board, Decisions and Orders of the National Labor Relations Board, page 235:
1 more example
In our opinion, he should not have done so because he thereby prevented the jury from awarding damages to the Hawkins family for the inconvenience, discomfort, and annoyance they suffered after Scituate Oil's tragic misdump left their home uninhabitable.2005, M. Stuart Madden, Gerald W. Boston, Law of Environmental and Toxic Torts: Cases, Materials, and Problems, page 272: