FUD
FUD is an acronym that stands for fear, uncertainty and doubt.
It refers to the practice of spreading negative opinion, news or even outright disinformation in order to influence the sentiment of a market.
Markets can be incredibly sensitive to changes in sentiment, which is why attempts to influence them in this way are so frowned upon.
The term FUD is commonly used by crypto traders, who use it as a label to disarm articles and posts that are thin on actual information but seem to be geared at inducing readers to form a negative opinion of this or that cryptocurrency project.