no zuo no die
This phrase is of Chinglish origin. Means if you don't do stupid things, they won't come back and bite you in the ass. (But if you do, they most certainly will.) Zuo /zwo/ is a Chinese character meaning 'act silly or daring (for attention)'
A: Some dude baked cookies shaped like iPhone, held it by the mouth when driving, tried to mess with traffic cops.
B: Did he pull it off?
A: Cop was pissed and ran his name through the system. Turns out he's got speed tickets unpaid!
B: No zuo no die.
http://www.urbandictionary.com/define.php?term=no+zuo+no+die