龙潭虎穴

龙潭虎穴 [lóng tán hǔ xué]

1. ■ a chasm for dragon to hide or a cave for tigers to have their lair; a dragon's pond and a tiger's cave -- dangerous places; a dragon's pool and a tiger's den -- a danger spot; a hazardous spot; dragon's watery lair and tiger's den; in the fens of dragons and the dens of tigers; mountain fastness; the pools where dragons are and the dens where tigers live