打草驚蛇

- （作事不密，反使對手有所警戒） beat the grass and frighten away the snake -- act rashly and alert the enemy; beat emptily upon the grass, and the snake will be frightened; beat the grass and drive the snake away; beat the grass and the snake will be startled; beat the grass to frighten away the snakes; beat the grass to startle the snake; frighten away ... by raising a scare; shake the bush to rouse the serpent; stir the grass and alarm the snake; wake a sleeping wolf