expression, ichidan verb
lose weight; slim down
Literally 'flesh falls off'; a somewhat colloquial expression for losing body fat or becoming thinner, often with a nuance of noticeable or desirable weight loss.
最近運動を始めて、少し肉が落ちた。
I started exercising recently and lost a bit of weight.
このダイエットでかなり肉
I hear you can lose quite a lot of weight with this diet.