obstinance
A person who’s too stubborn to even blink, even if it means getting stuck in the middle of a sandwich.
My little brother won’t let me eat the last piece of pizza. He’s the obstinate kind that won’t even blink.
My dog won’t stop barking at the mailman. He’s the obstinate kind that won’t even blink.
My mom won’t let me watch TV. She’s the obstinate kind that won’t even blink.