not mince words

(idiom) directly criticize someone without being polite

Example Sentences:

Student: How did I do on my exam, teacher?
Teacher: I will not mince words, your speaking was terrible. Your grammar is below-average, and you don’t know any vocabulary.

Rebecca’s boss did not mince words when he told Rebecca that she was lazy, always late, and rude to other co-workers.

Boyfriend: I’m breaking up with you.
Girlfriend: Why?
Boyfriend: It’s not important.
Girlfriend: Tell me! Don’t mince words.
Boyfriend: I’m gay.

From the Blogs:

Prince Harry: “My Mother didn’t mince her words and nor will I”

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