Historical and political term for the alleged threat to Western civilization posed by East Asians. Often used in discussions of early 20th-century racism and propaganda.
harm from train toilet waste
Obsolete colloquial term for the environmental harm caused by dumping human waste from train toilets onto the track. Now only of historical interest.
The Yellow Peril theory is a racist idea that spread in the West in the early 20th century.
On old trains, human waste was dumped from toilets onto the track, causing a problem called 'yellow harm'.