Describes a place so crowded that there is no space even for water to flow through.
汇排泄。象是连水也流不出去。形容拥挤或包围的非常严密。
宋·释道原《景德传灯录》德山门下，水泄不通。”
The subway station was packed so tight that people were squeezed together like sardines.
Learn the next connected idiom: 水泄不通 (shuǐ xiè bù tōng) → 通力合作 (tōng lì hé zuò)
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