Every Saturday I’ll give you a couple of idioms to learn. An idiom is a saying or phrase whose meaning cannot be taken from the literal meanings of the words.
sacred cow: a person or thing that is never criticized or changed even if it should be
Example:
Until the politicians deal with the sacred cow of entitlement programs, the US will not solve its debt problem.
scaredy-cat: someone who is easily frightened (used by children)
Example:
Why are you such a scaredy-cat? It’s just a little old spider!