on the loose   (TTS發音)

free to go自由行動

    The zoo keeper forgot to close the gate to the monkey cage and the monkeys were on the loose. 動物園管理員忘記關上籠子，于是猴子在外面四處亂跑。

    Brown has gone out on the loose，and won't be back till late. 布朗出去玩去了，要很晚才回來。