* kill someone with kindness好得让人受不了
The old lady almost killed me with kindness when I lived at her home.
* parade one's knowledge买弄学问
He is a well-learned man, bit he never parades his knowledge.
* be at large逍遥法外(也可以形容动物不受约束)
The murderer was still at large. The victim's parents was determined to find enough evidence to sue him to court.
* rest on one's laurels故步自封，吃老本
You are sure to be lagged behind if you rest on your laurels.
* turn over a new leaf洗心革面
The juvenile delinquent promised that he would turn over a new leaf if he could be given lenient punishment.
* have a hollow leg(喝酒)海量