She is dropping a dime on someone.

He dropped a clanger at the meeting.

He drops a bollock during the presentation.

He is dropping a bollock by forgetting to bring his presentation.

He is dropping a clanger by forgetting his wife's birthday.

He drops a dime on someone.

He drops a clanger every time he opens his mouth.

He drops like a bad habit whenever things get tough.

I saw the new movie, but I dropped it like a hot brick.

He drops like a hot brick whenever he sees a spider.