龙潭虎穴

Explanation: Long home to deep puddles potential tiger hiding in the lair. Analogy very sinister place. 　　Usage: Joint type; as subject, object, attribute; metaphor very dangerous place 　　Source: Ming Shinai "Water Margin" 60 back: "Bonus to teach, Lu Chun-Yi Chu Wai Hang write it, to try Longtanhuxue." 　　Examples: Your father because he was not a poetry and ritual of the door, one side said no, they have to leave this ~. ★ Qing Wen Kang "Heroic Biography" Nineteenth back Thesaurus:  tiger&rsquo, Tiger Cave vauclusian spring