Idiom 152: old flame

상황: 옛애인을 가리킬 때 사용합니다. ex boyfriend or ex girfriend라고도 하죠.

old flame = someone with whom you once had a romantic relationship = former boyfriend or girlfriend

She bumped into an old flame at the shopping mall.

Idiom 151: let someone off the hook

상황: 용의선상에서 벗어나다라고 할 때 쓰는 표현입니다.

let someone off the hook = excuse from a penalty or promise

Because this eas his first criminal offense, he was let off the hook.