noun
surging crowd; stampede of people
Rare term for a crowd moving like an avalanche; often used in news or literary descriptions of dangerous crowd surges.
祭りで人雪崩が起き、けが人が出た。
A surging crowd occurred at the festival, causing injuries.
Compound of 人 (hito, 'person') and 雪崩 (nadare, 'avalanche'), literally 'human avalanche'. The exact historical derivation is uncertain, but the term is a metaphorical extension of the snow avalanche concept to describe a surging crowd.