not mince matters
To speak (about something) very bluntly and directly, without regard to whether one's words may cause upset or controversy. Wow, your aunt really doesn't mince matters when she discusses politics, huh? I won't mince matters—our company is in dire straits.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Also, mince words. Moderate or restrain one's language to be polite or avoid giving offense. Today these phrases are nearly always put negatively, as in Not to mince matters, I feel he should resign, or Don't mince words-say what you mean. The usage dates from the mid-1500s and transfers cutting something such as meat into small pieces to minimizing the harsh impact of words.
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.