不识高低

Explanation: Know: that to know. Say or do things that I do not know the depth, severity 　　Usage: Verb-object type; as predicate, attributive; with derogatory 　　Source: Ming Wu Cheng-en, "Journey to the West" 41 back: "You little beast, not knowing the level! Looking stick!" Thesaurus:  Act recklessly, guiltless interest, not knowing whether to advance or retreat, abrupt, guiltless deep, guiltless accident, Primary calf, have an exaggerated opinion of one's abilities as one who does not know the immensity of heaven and earth, be very promising Antonym Group:  Reasonable notice, Reasonable notice of