How do you define "Heartbreaker?"

[...m...]

(christ, you don't know the meaning of heartbreak, buddy)

 

[Marc17]

Personally, it has always been used mostly for the people you'd meet at cons in the 80's & 90's who were sure that they had god's gift to gaming in a new game that was often, but not always just a D&D clone with something added, and usually something that nobody else cared about. They were just so earnest in believing they had the thing that everybody would see as so much better than D&D (but that even if they ever finished "testing" or get something printed, there was nothing to it).