不打不闹不是你不吵不叫不是你
[bù dă bù nào bù shì nĭ bù chăo bù jiào bù shì nĭ]
A colloquial expression indicating someone used to act wildly ('if not being naughty/naive, it wouldn't be like you'), reflecting the person was known for their wildness or playfulness in the past. It captures the mischievous side of the user when they were younger.