i-adjective
forgetful; absent-minded
Describes a person who tends to forget things easily. Often used in a self-deprecating or mildly critical way.
最近、忘れっぽくなった気がする。
I feel like I've become forgetful lately.
彼は忘れっぽいから、大事なことはメモしたほうがいいよ。
He's forgetful, so you'd better write down important things.