to horse around 意思是闹着玩儿，嬉戏玩耍。
- During the school holidays there was no peace in the house. Johnny and Annie horsed around all day, every day.
- I was horsing around with some friends in the library - we got told to leave.
值得注意的是，短语 from the horse's mouth 意思是指消息来自最直接、最可靠的出处。
- Interest rates are definitely going up next month. The finance minister was talking about it on TV - I heard it from the horse's mouth.
