A calque of Chinese 河蟹 (héxiè).
river crab (plural river crabs)
- A Chinese mitten crab.
From 河蟹 (héxiè, “river crab”) above, a near-homonym of 和谐 (héxié, “harmony”), referring to China's Harmonious Society campaign.
river crab
- (Internet slang) Government censorship.