I realize that metaphor is used in Austrian Economics/on the forums. Here are a couple of examples. Feel free to comment or add your own, or discuss the relevant role of metaphor in the profession.
Trolling - A derogitory term used on the forum to describe someone who is behaving badly on the forums. THESE PEOPLE ARE NOT LITERAL TROLLS. They do not guard bridges, waiting for a fee. They do not regenerate unless they are attacked by fire. I think the metaphor started by “trolling the depths”.
Value scale - It always seemed weird, when I read Man, Economy, and State, that Rothbard would portray humans as having a big honkin huge value scale. I wondered, is that how I think? Now, I realize that its just a metaphor. He was trying to use the concept of a scale to introduce the concept that someone prefers X state of affairs to Y state of affairs, that they would rather have things go one way rather than the other. Humans usually don’t construct a value scale in their mind; the value scales that Rothbard shows are simply used to help illustrate what human action is similar to.
bubble - the housing bubble is not a bubble. Rather, bubble is used to help the layman understand that the state of affairs cannot go on forever, like a bubble. There is other symbolism in the fact that bubbles expand when blown up, and it is harder for the bigger bubbles to sustain themselves.
Supply and Demand - The word Demand is a metaphor. People do not demand a sandwich, violently, when they want one, they transact with others or produce it themselves to get one.
TAXATION IS THEFT - This is not a literal equation, as some critics claim it means. The taxman does not sneak around and take valuables from the house. He does not literally point a gun at your head and threaten to pull the trigger if you don’t pay up. Rather, this is used to show that both of these actions violate the rights of the person being stolen from, both of them are wrong, and both should be stopped.
Austrian Economics - This is not how Economics is done in Austria (although one can hope). Rather, this metaphorical name originated from the fact that some economists that contributed to this school of thought (Ludwig Von Mises, Hayek) were from Austria.