好姑娘别犯贱o
[hăo gū niáng bié fàn jiàn o]
'Good Girl Don't Be Petty', is often a humorous way of advising someone not to degrade themselves or act in a manner unworthy of their self-esteem. Here 'commit stupidity' or 'be petty' has been replaced by a less offensive term to soften this advice.