To go to extremes, especially as a result of enthusiasm.走极端，尤指由激情引起地
柯林斯高阶英汉双解学习词典释义
ADV
向舷外
If you fall overboard, you fall over the side of a boat into the water.
例句
His sailing instructor fell overboard and drowned during a lesson...他的航海教练在一次训练课时从船上失足跌入水中，溺水身亡。He had jumped overboard in New York harbor and swum to shore.他在纽约港跳下船，游上了岸。
PHRASE
做得过分（或过火）
If you say that someone goes overboard, you mean that they do something to a greater extent than is necessary or reasonable.
例句
Women sometimes damage their skin by going overboard with abrasive cleansers...女性有时因过度使用磨砂膏而损伤了皮肤。What do you think causes the police to go overboard, to use excessive violence?你认为是什么原因导致警察行为过激，滥用暴力？
PHRASE
抛弃，丢弃（想法、建议等）
If you throw something overboard, for example an idea or suggestion, you reject it completely.
例句
They had thrown their neutrality overboard in the crisis.他们在这场危机中丢弃了中立立场。
英汉词典释义
adv.
越过船边坠入水中, 在船外
A sailor fell overboard and was rescued.一个船员从船上落入水中, 被救了上来。
充满热情；全身心投入；非常热中
I told her just to cook a simple meal but she went completely overboard.我只让她做顿便饭，可她很有兴致，做得很丰盛。He doesn’t just like her. He’s gone completely overboard about her.他可不仅仅只是喜欢她而已，他简直为她着迷。
拒绝； 丟弃
All ideas of reform were thrown overboard when the new government came to power.新政府上台后，所有的改革构想都被弃置一边。