hi all.,
i am not a day trader , so i dont know much about these terms.,
there was trollbox on polo where people used to say pump and dump specific coins. but trollbox is gone now.,
from basic understanding dump means DROP,
does the PUMP means buy ?
Pump and dump are the basic concept of rise and fall of the price intentionally.It can be done by various method such as Fake News,Whale's(These are the individuals or group who are powerful with loads of money and stakes in there hand) and due some government bans.It is mostly intentional and is done to generate lots of profit to the individuals or lot of people.But surprisingly it is the best time to buy and sell your coins to generate lots of in short span.Hope this will help you in understanding the concept.