Drop the subject!
drop the subject
Stop discussing this topic at once. Yes, I was late today—can we just drop the subject now? I don't want to talk about my ex anymore! Drop the subject!
Drop the subject!and Drop it!
Fig. Do not discuss it further! Bill: Sally, you're gaining a little weight. I thought you were on a diet. Sally: That's enough! Drop the subject! Bill: That house is a mess. I wonder who lives there. Mary: That's my aunt's house. Just what did you want to know about it? Bill: Oh, drop it! Sorry I asked.
See also: drop