<P> The idiom is apparently derived from a centuries - old Scottish proverb , though some other references to pigs flying or pigs with wings are more famous . At least one appears in the works of Lewis Carroll : </P>
<P> The idiom is apparently derived from a centuries - old Scottish proverb , though some other references to pigs flying or pigs with wings are more famous . At least one appears in the works of Lewis Carroll : </P>
where does the expression when pigs fly come from
where does the expression when pigs fly come from
a centuries - old Scottish proverb
a centuries - old Scottish proverb