It is an old British and Australian saying.
To tread lightly on a subject
The quote, " as sure as eggs" as from To Kill A Mockingbird, by Harper Lee can mean many different things. But the most clear definition is that it's "somthing that you say when you are certain about what is going to happen or what someone will do." From The Free Dictionary by Farlex. http://idioms.thefreedictionary.com/sure+as+eggs+is+eggs
Palestinian and Persian
food
Meaning he will help you out.
To tread lightly on a subject
Something that can supply a sure victory when revealed (per PhraseFinder) ... comes from playing a card game
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To be exposed
Origin "up a storm"
There isn't an idiom called "eggs basket." Perhaps you are thinking of the old proverb that says "don't keep your eggs in one basket."
No
The quote, " as sure as eggs" as from To Kill A Mockingbird, by Harper Lee can mean many different things. But the most clear definition is that it's "somthing that you say when you are certain about what is going to happen or what someone will do." From The Free Dictionary by Farlex. http://idioms.thefreedictionary.com/sure+as+eggs+is+eggs
Palestinian and Persian
food
RELAX
To hope for the best