A dog that eats eggs out of a hen house. Such a dog is considered low down and no damn good. A scoundrel or nefarious person can also be called and egg-sucking dog. Reference Johny Cash's song "Dirty Old Egg Sucking Dog".
My neighbor Billy is an egg-sucking dog. He took a box of Girl Scout cookies and didn't pay for them.
by benboy73 March 6, 2018
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An individual with an unbreakable habit.

Although this definition is based on a state supreme court case in which a dog was sentenced to death for raiding a chicken coup, the term is most commonly used as a metaphor.
You'll never get that egg-sucking dog Rush off his oxy.
by ambiguator October 18, 2011
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This literally refers to a seriously ugly or mangy mongrel. Said to be descrbed this way because of its non-doglike penchant for eating the insides of eggs.

Metaphorically, it can be applied to a person (almost always male) who is out-and-out riff-raff: one of the inbred corps.
Ole Billy Bob was just an egg-sucking dog.
by Duckbutt August 1, 2006
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