任性耍点小脾气霸道耍点小无赖
[rèn xìng shuă diăn xiăo pí qì bà dào shuă diăn xiăo wú lài]
It describes someone who acts whimsically at times, throwing small tantrums, while also being a little stubborn and naughty in their manner. It's an endearing way to acknowledge occasional childish behavior.