Where did the expression come from:"Spill the beans"?

Question

I finally realized what it meant but for a long time, being a foreigner, it was a puzzle to me!!

Answer 1

A popular folk etymology for spill the beans claims that in ancient Greece, applicants for membership in secret societies were voted upon by having the existing members drop beans into an opaque pottery jar. Those who approved of the potential new member would signal an affirmative vote by stealthily adding a white bean to the jar. A black bean indicated a negative vote.

The story goes that on occasion, when the jar was accidentally knocked over, the beans poured out and the vote was revealed prematurely. Somebody had spilled the beans. It's an engaging tale, and beans were in fact once used as ballots, but since the phrase is American and was not seen until 1919, neither the story nor the jar holds water.

Answer 2

they have so many strange ones, like
"you got to have guts to do that"
or
"break a leg"