field day 
noun
1 [in singular] An opportunity for action or success, especially at the expense of others: the newspapers had a field day as the case came to court...
- The first problem with these practices is that capitalists are having a field day at our expense.
- But the media also had a field day writing about your break up!
- The only sour note during a fortnight of success came when the tabloids had a field day over Sam's withdrawal from the Dunhill Links Championship.
2 Military A review or an exercise, especially in manoeuvring.In the Navy, "field day" refers to a thorough cleaning of the ship's spaces....
- Saturday was the field day, when all the companies met, and were trained together.
- We have had field day attendees representing almost every branch of the Armed Forces: Army, Navy, Air Force, and Marine Corps.
3North American A day devoted to athletics or other sporting events and contests.Put up a cork/bulletin board for the kids to hang ribbons and medals from field days, school spirit events and competitions....
- One of the highlights of the field day is a team event called It's A Knockout, based on the theme of the TV series of the same name.
- There will be the usual field day events such as bottle stall, wheel of fortune, goldfish, throw the dice, book stall etc. etc.
4Australian /NZ A day set aside for the display of agricultural machinery.The little town of Henty, in southern New South Wales, is a small unassuming place that traditionally holds one of the country's biggest agricultural field days....
- Well Bruce Haig is a diplomat no longer, in fact he's a farmer, and he joins me from Gunnedah in New South Wales where he's actually attending an agricultural field day.
- The Department of Agriculture told growers at its annual field day last week of the potential to produce high oil producing crops for use in biodiesel production.
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