dead against

listen to the pronunciation of dead against
Englisch - Englisch
Unequivocally and intransigently opposed to

The person who was most dead against playing the game was Stuart,” says Mick. “But he’s definitely a lot more relaxed about it these days.”.

dead set against
Completely opposed, with no possibility of a change of mind

I am dead set against letting the dog sleep in anyone's bedroom.

be dead against
be strongly opposed, resist
dead set against
{s} determined and firmly resolved not to do something
dead against