"Playing pig to eat the tiger" (扮猪吃虎 / bān zhū chī hǔ) is a Chinese idiom that literally means pretend to be a pig in order to eat the tiger.
It describes a strategy of hiding one's true strength, intelligence, or intentions by appearing weak, harmless, or foolish, only to strike when the opponent underestimates you.
Pig (猪): In Chinese culture, pigs are seen as clumsy, harmless, and unintelligent.
Tiger (虎): Represents strength, fierceness, and dominance.
The idea is paradoxical: a "pig" could never defeat a tiger—but if the pig is only pretending, it can lure the tiger into lowering its guard, then reveal its hidden power.
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I pluck this from my footnote on chapter: Freshly Squeezed Human Blood Juice, The Cube Queen's Apocalypse Feast, Volume 4: The Quaking Harvest