noun
A somewhat dated or euphemistic term for toilet paper; トイレットペーパー is more common in modern everyday speech.
See also: トイレットペーパー
昔は落とし紙として新聞紙を使うこともあった。
In the past, people sometimes used newspaper as toilet paper.
トイレに落とし紙が切れていた。
The toilet paper had run out in the restroom.
The standard modern term for toilet paper; 落とし紙 is older and less common.
Compound of 落とし (otoshi, 'dropping') + 紙 (kami, 'paper'), referring to paper used in the toilet. The exact historical derivation is uncertain.