To study or work hard, especially when pressed for time.
He dropped the small bone in his pocket.
The car abruptly halted its progress, slinging Lisa against the steering wheel with bone jarring force.
You have the most beautiful bone structure.
If you don't remember where you buried the bone, it isn't going to be much help when you get hungry later.
He decided to move on to problem number two and find out something about the tiny bone he'd discovered.