However, we can play with the idea and come up with something fun:
Possible words:
* "Fiddlesticks!" - This is a classic exclamation of annoyance, fitting for a grumpy leprechaun.
* "Shivers!" - A more dramatic word, suggesting a magical outburst.
* "Darg!" - A made-up word, sounding like an old Irish curse.
* "Gold-blasted!" - This word plays on their obsession with gold.
* "Shamrock-spit!" - A more playful, but still angry, expression.
Remember, you can be creative and use your imagination! The best word is the one that fits your story or situation. 😄