be kind, generous, etc. to a fault idiom, be knee-high to a grasshopper idiom, be knocking (on) 60, 70, etc. idiom, be known to be/do sth idiom, be laughed out of court idiom, be laughing all the way to the bank idiom, be laughing idiom, be laughing on the other side of your face idiom, 返回 be laid up