用词自相矛盾的话
a combination of words that is nonsense because some of the words suggest the opposite of some of the others
Many people think that an honest politician is a contradiction in terms. 许多人认为“诚实的政客”在用词上自相矛盾。
We went on an anarchist march, which is kind of a contradiction in terms.
Many engineers consider sustainable concrete a contradiction in terms.
He has produced a subtle thriller, if that's not a contradiction in terms.
See also: contradiction