noun
1.
a. : a darkening of the skin about the eye resulting from a bruise
b.
(1) : a severe defeat : setback , rebuff
voters gave the administration a black eye
(2) : a discrediting : a bad reputation
pleasant views may greet visitors instead of sore spots which might give the community a black eye — New York Times
the word “aristocracy” in this country has a black eye — A.N.Whitehead
2. : an eye with a very dark iris