Has a Field Day?

COMMON If someone has a field day, they enjoy doing something or gain advantages from something, especially something that is caused by problems other people are having. Debt collectors are having a field day in the recession.

What does have a field day mean?

: to get a lot of pleasure and enjoyment from doing something —used especially to describe getting enjoyment from criticizing someone, making fun of someone, etc. If word of his involvement in this scandal ever leaks out, the newspapers are going to have a field day.

Why do we say have a field day?

Originally, field day was a military term that referred to a day dedicated to military maneuvers, as these military maneuvers occurred in actual fields. During the 1800s the term field day came to mean any day during which exciting or big events occurred.