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

• Lexulous
• Wordscraper
• Wordosaur

adj. superlative form of bloodthirsty: most bloodthirsty.

"Suicidal killers in front of him, a house full of colleagues behind him, scrambling for safety during one of the bloodiest and bloodthirstiest attacks of the Afghan war."