rat race

[rat race] {n.}, {slang} A very confusing, crowded, or disorderlyrush; a confusing scramble, struggle, or way of living that does notseem to have a purpose.

The dance last night was a rat race. It wastoo noisy and crowded.

School can be a rat race if you don't keepup with your studies.

This job is a rat race. The faster you work,the faster the boss wants you to work.