perish the thought!
used to say that you hope what someone has suggested will never happen

[TahlilGaran] Dictionary of Contemporary English ▲

perish the thought
do not even think about it.
I don't think either parent would ever, perish the thought, tell that kid “no.”

[TahlilGaran] English Idioms Dictionary ▲

Perish the thought!
something that you say which means you hope very much that something does not happen.
If his father came to live with us, perish the thought, I can't imagine what strain that would put on our relationship.

[TahlilGaran] English Idioms Dictionary ▲

perish the thought
v. phr. Let us not even think of it; may it never come true.
■ Used as an exclamation.
If John fails the college entrance exam
■ perish the thought
■ he will go back to high school for one more year.
Perish the thought that Mary should have cancer.
Compare: GOD FORBID.

[TahlilGaran] English Idioms Dictionary ▲