/ˈoʊ vərˌbɔrd, -ˌboʊrd/
over the side of a ship or boat, especially into or in the water:
to fall overboard.
to go to extremes, especially in regard to approval or disapproval of a person or thing:
I think the critics went overboard in panning that new show.
from on board a vessel into the water
a. to be extremely enthusiastic
b. to go to extremes
to reject or abandon
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
Never throw anything overboard, and be aware of marine life in the waters around you.
Going overboard in attempts to rehydrate is also common among endurance athletes.
He realizes that his system can be difficult and that he's often accused of going overboard with elaborate schemes.
Covers the related facts of why there isn't a concern without going overboard on the hyperbole.
We all go a bit overboard with the language sometimes.
Going overboard also can be a consequence of tripping over or being caught in fishing gear.
The second grant enabled towns to measure overboard discharge.
Falls overboard are the second leading cause of boating fatalities.