A sudden sell-off of digital assets.
The term often goes hand in hand with a pump and dump schemes, which are almost always associated with fraudulent activity and an attempt to artificially manipulate the price of a cryptocurrency.
A perfectly legitimate dump may also relate to the swift disposal of your own cryptocurrency holdings in order to draw instant profit.
A well-known example of a dump and the effect it can have came in December 2017, when Litecoin founder Charlie Lee sold his considerably holdings of LTC amid concerns that it amounted to a conflict of interest.
At first, the markets seemed nonplussed by the event. However, within days, LTC nosedived down a red line and lost almost half of its worth. It took weeks to recover the lost value.