自身难保: risk one's head; be unable even to fend for oneself; can hardly survive; cannot even be sure of one's own safety; hardly be able to save oneself; hard to protect one's own self; may endang
明天难保不下雨: you can't say for sure that it won't rain tomorrow
泥菩萨过江自身难保: be like a bunch of clay idols crossing a river