Definition
This idiom describes someone in a desperate situation who will try any possible means to improve it, even if the chance of success is very small.
In the midst of his financial crisis, he tried to sell all of his collectibles, it was really a case of a drowning man clutching at a straw.
When she knew she was about to be fired, she started flattering the boss, it was a case of a drowning man clutching at a straw.
He knew he was going to fail the exam so he tried to get the teacher to change his grade, it was definitely a case of a drowning man clutching at a straw.