Definition
Unable to think or behave normally due to extreme worry, unhappiness, or anger.
The news of her brother's accident drove her out of her mind.
He was out of his mind when he realized his keys were locked in the car.
I was out of my mind with worry when my daughter didn't come home last night.
Acting in an extremely foolish or irrational manner; behaving as if mentally ill.
You must be out of your mind to go swimming in this weather!
He must be out of his mind to take the test without preparing.
They are out of their minds to cycle through the city during rush hour.