放荡不羁

zhè ge hái zi zì cóng mǔ qīn sǐ hòu jiù fàng dàng bù jī le

这个孩子自从母亲死后就放荡不羁了。

Since his mother's death, the boy has had full swing.

tā de yī xiē péng you shì nà zhǒng fàng dàng bù jī de rén

他的一些朋友是那种放荡不羁的人。

Some of his friends are pretty wild characters.