noun, na-adjective, noun which may take the genitive case particle 'no'
careless person; scatterbrain; hasty person
Describes someone who is clumsy, forgetful, or acts without thinking, often in a light-hearted or affectionate way. Can be used as a noun or adjectivally.
彼はおっちょこちょいで、よく物を忘れる。
He's a scatterbrain and often forgets things.
Her careless side is part of her charm.