Shows you don't believe what someone's saying and find their excuse or reason unsatisfactory.

Disbelief Express

Used to express irritation or frustration with someone, often when you think they're being dishonest.

Frustration Signal

Marks a point in conversation where you're rejecting what's been said and possibly changing the subject.

It's about refusing to take or accept something being offered physically.

Can be a way of declining responsibility, work, or an obligation that someone is trying to pass off to you.

It's a polite way to say you can’t or don’t want to handle more work, stress, or problems.