overboard
adverb /ˈəʊvəbɔːd/
  /ˈəʊvərbɔːrd/
 Idioms - over the side of a boat or a ship into the water- to fall/jump overboard
- Huge waves washed him overboard.
 Oxford Collocations DictionaryOverboard is used with these verbs:- dump
- fall
- jump
- …
 
Idioms 
go overboard 
- (informal) to be too excited or enthusiastic about something or about doing something- Don't go overboard on fitness.
 
throw somebody/something overboard 
- to get rid of somebody/something that you think is not useful- He threw all his old friends overboard once he was promoted.