不哭不闹那不是我
[bù kū bù nào nèi bù shì wŏ]
It means 'If I didn't cry or make any fuss then it would not be me'. This indicates someone expressing a personality trait of their emotional behavior where they tend to react strongly towards situations in life, showing that they're not usually calm and peaceful, instead more inclined to show sadness and outbursts when facing problems.