throw a veil over (something)
To conceal something, usually by not talking about it. Can we please throw a veil over that stupid rumor about me? It's not true, but I want as few people to hear about it as possible. I tried to throw a veil over my inexperience so that the recruiter would seriously consider me for the job.
cast/draw/throw a ˈveil over something
(written) say nothing or no more about something unpleasant: It is kinder to draw a veil over some of his later movies.