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1.
A term used to describe Irish people, particularly the ones who immigrated to the US in there masses, during the late 1800's - early 1900's. They would typically have blue eyes, and were nicknamed 'duck eggs' as actual duck eggs often have blue tints in them.
This Irish pub is full of Duck Eggs... Funnily enough!
by Caz_456 June 30, 2008
 
2.
Referring to someone as an idiot or being stupid.
Bunyan you duckegg!!
by Mark March 17, 2005
 
3.
nothing; use with aim
~yo
~hey ya
~sup
~duck egg. u?
~lol
by lisa February 21, 2004