I keep hearing the term nerf over the internet, specially in Hearthstone discussions.
For example: "Six Hearthstone Cards That Need a Good Nerf". & "Why Blizzard won't nerf Dr. Boom?"
What does it mean in terms of hearthstone? cite an example. Could you explain it in jargon-free way. Sorry for my bad English.
Edit: According to classic definition on Wikipedia, it says: In video gaming, a nerf is a change to a game that makes something less effective or desirable. The word can be used as a verb to describe that change. Which I get it.