Question 1

What does "stubborn up" mean?

Accepted Answer

To become noticeably more stubborn or unyielding, especially under pressure.

Question 2

How do you use "stubborn up" in a sentence?

Accepted Answer

Every time we tried to negotiate, he just stubborned up and refused to listen.

Question 3

Is "stubborn up" formal or informal?

Accepted Answer

"stubborn up" is informal — used mainly in casual conversation. A rare, chiefly American informal expression. Not widely documented; may be encountered in regional speech or informal writing. Most speakers would prefer 'dig in', 'dig their heels in', or 'stand their ground'.

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