dead set against something

(idiom) to be completely against something

Example Sentences:

When the teenaged girl asked her father if she could sleep at her boyfriend’s house, he told her he was dead set against it.

A: Do you eat meat?
B: No, I’m vegan.
A: Why? You don’t like eating chicken?
B: I’m dead set against eating meat. I think it’s murder.

From the Blogs:

Terrorists are still dead set against us

Media:

Similar idioms:

1. over my dead body
2. when hell freezes over
3. dead on one’s feet
4. dead serious
5. when pigs fly
6. dead from the neck up
7. chicken