This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. One who engages in brinksmanship.

"Had the Administration tried to work openly with Congress on a lot of these matters, rather than continually assert the rights of Executive Authority, we might not be in the state we are in, now, after this brinksman approach."