over·board /ˈovɚ/
(ad.)自船上落下,在船外
O·ver·board adv. Over the side of a ship; hence, from on board of a ship, into the water; as, to fall overboard.
To throw overboard, to discard; to abandon, as a dependent or friend.
To go overboard, to go to an extreme; to overdo; as, he went overboard at the buffet and got an upset stomach.
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overboard
adv 1: to extremes; "he went overboard to please his in-laws"
2: from on board a vessel into the water; "they dropped their
garbage overboard"