Chinglish translation of the Chinese saying - 男人不坏,女人不爱. (Real meaning: Ladies
like naughty men)
The phrase 'pet pet' means
ass in Cantonese slang.
When used in full form, it means that if the
guy is not naughty, he will not get ladies (or get laid)
Person 1: Eh, why is that jerk so
popular amongst girls?
Person 2: Do you know boy no bad
bad, get no pet pet?
or
Person 1: Why am I still single?
Person 2: Ayo you need to stop being a
nerd. Remember, boy no bad bad, get no pet pet.