Scatty is a British, informal word for someone who often forgets or loses things because they are not being sensible or practical — the same neighbourhood of meaning as scatterbrained. A scatty person mixes up days, cannot find the bus pass, walks into a room and cannot remember why. It is usually said with a smile, not as a hard insult. You hear it from British speakers more than from American ones; Americans nearly always say scatterbrained, or something like ditzy, instead. It can sound a little homely or old-fashioned — a parent, a novel, a chat — not a word for a school report. Though actually, it is about daily muddle, not about a sharp tongue. That other word is catty, and it is not this one.

迷糊、丟三落四（英式口語，意思近 scatterbrained）