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 cocky: most cocky.

"Macarthy – switching from truculence to triumphalism as fast as the cockiest small boy; buckling a fine swash for the children in the audience; offering adult eyes a suggestion of pathos, of knowing that he is trapped in a dream yet still bewitched by its promise of "fun" – certainly has something to crow about."