‘挖坑’ literally means 'to dig a pit' — combining 挖 (wā), meaning 'to dig', and 坑 (kēng), meaning 'pit' or 'hole'. While it can refer to the physical act of digging, such as preparing land or burying something, it’s frequently used figuratively to mean 'to set a trap' — especially in social, political, or online contexts where someone deliberately creates a situation to mislead, embarrass, or disadvantage others. The verb often carries a negative connotation, implying deception or manipulation.

This expression is common in informal spoken and written Chinese, including internet slang and news commentary. It appears in discussions about workplace politics, media tactics, or even animal behavior — for example, when describing how certain predators dig pits to ambush prey. Though originally concrete, its figurative use now dominates everyday usage among native speakers, particularly among younger generations.