1. throw overboard : 抛弃；
副词
形容词
1. 向舷外
If you fall overboard, you fall over the side of a boat into the water.
2. 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.
3. 抛弃，丢弃（想法、建议等）
If you throw something overboard, for example an idea or suggestion, you reject it completely.
1. from on board a vessel into the water
e.g. they dropped their garbage overboard
2. to extremes
e.g. he went overboard to please his in-laws