Merriam-Webster Collegiate Dictionary - dump

 I. verb  Etymology: perhaps from Middle Dutch dompen to immerse, topple; akin to Old Norse ~a to thump, fall suddenly  Date: 1784  transitive verb  1.  a. to let fall in or as if in a heap or mass ~ed his clothes on the bed  b. to get rid of unceremoniously or irresponsibly got ~ed by his girlfriend  c. jettison an airplane ~ing gasoline  2. slang to knock down ; beat the man rushed out and ~ed him — John Corry  3. to sell in quantity at a very low price; specifically to sell abroad at less than the market price at home  4. to copy (data in a computer's internal storage) to an external storage or output device  5.  a. to hit or throw short and softly ~ a pass to a running back ~ a bunt down the line  b. to hit (a puck) deep into the opponent's zone in ice hockey  intransitive verb  1. to fall abruptly ; plunge  2. to ~ refuse  II. noun  Date: 1784  1.  a. an accumulation of refuse and discarded materials  b. a place where such materials are ~ed  2.  a. a quantity of reserve materials accumulated at one place  b. a place where such materials are stored ammunition ~  3. a disorderly, slovenly, or objectionable place  4. an instance of ~ing data stored in a computer  5. often vulgar an act of defecation — usually used with take