A phrase used to fend off questions about a situation one finds awkward, unpleasant, or unsatisfactory. For example, How did we do in the bridge tournament? Don't ask! [Colloquial; 1960s] For a similar phrase, see forget it.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.