引狼入室

引狼入室 [yǐn láng rù shì]

1. ■ invite [bring] a wolf into the house; bring disaster upon oneself; invite disaster by letting in invaders; lead a wolf into one's house -- to bring about ruin to oneself; let a wolf into the sheepfold; let wolves into the house; open the door to a dangerous foe; set a fox to keep one's geese; set the wolf to keep the sheep; usher [lead; bring] wolves into the house