The tail-offs of the sales were unexpected.

The sound of the waves tail off as we move further away from the shore.

The music gradually tails off at the end of the song.

The music tailed off as the party came to an end.

The sound of the music was tailing off as the party came to an end.

The tail-off of the party lasted until the early hours of the morning.

I work my tail off every day to achieve my goals.

I have been working my tail off to meet the deadline.

She works her tail off to achieve her goals.

I worked my tail off to finish the project on time.