This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The state or characteristic of being hotheaded; the tendency to be easily infuriated or provoked.

"I don't give a shit if Obama himself calls McCain a hothead or "Trigger McCain" or anything else ... the hotheadedness is the one thing about McCain everyone in the country dreads and it needs to be spoken and made an issue of."