以卵投石

Explanation: Take the egg to touch the stone. Metaphor does not estimate their own strength, self-defeating. 　　Usage: Partial official; as the predicate attribute, object; containing derogatory 　　Source: "Xunzi proposed soldiers" by Jie for Yao, give an example of testing the waters if the eggs to refer to around the boiling. "" Mozi your righteousness "in its statement Fei-wu speaker, is also still testing the waters to the eggs, the eggs make the world, the stone is also still can not be destroyed also." Thesaurus:  Pi Fu regret tree, overestimate one’ s strength or oneself, Lisuo cannot, kick against the pricks, Pi Fu Tai Basin, Pi Fu shake the tree, Mantis arm when the car, Tarzan Egg press, Ant Shake the tree