There is the hackneyed image of a short fuse. You should be able to think of something better. A match looking for a spark? No, you can do better.
A boiling kettle is a metaphor that could represent a short temper. Just like a kettle whistling when the water inside reaches its boiling point, a person with a short temper might quickly reach a point of frustration or anger.
Temper Attention Span Memory
if they have low blood sugar they may have a short temper.
Short Temper - 2011 was released on: USA: 17 April 2011
Temper
Yes, Morgan Horses do have a temper. They have a temper, if you are in a bad mood, or if they want something and don't get it.
its when you get mad or angry easily
Crabapple :)
impatient
I'M Norwegian, and I defiantly do have a short temper.
thomas Jefferson
A crab apple.
My boss's temper is very short.