やなぎにかぜ
handling things without making waves; taking in one's stride
Expression
あいつにはまいったよ。どんなに厳きびしく怒おこっても、柳やなぎに風かぜと受うけ流ながすだけだよ。
I don't know what to do with that guy. No matter how mad I get at him he just takes it in stride and pays no attention.