buck's night

plural buck's nights

1. AustraliaA party held for a man who is about to be married.

   Fort Arnott, it was a big week. He was soon to be married and a buck's night was held in his honour.

   2006, Murray Engleheart, AC/DC: Maximum Rock & Roll: The Ultimate Story of the World's Greatest Rock-and-Roll Band, Harper Entertainment, published 2008, →ISBN, page 257

   2 more examples

   The bride's mother fanned her perspiring face with a serviette and the best man, who had been drinking solidly since the buck's night, threw up noisily behind a clump of lantana in the backyard.

   1994, Amanda Midlam, Muriel's Wedding, Penguin, →ISBN, page 1

   My best man, Joe, had to be held up by his wife during the ceremony because he was still smashed after our buck's night the evening before.

   2011, Mark A. Bruhwiller, From Seven Hills to the Seven Seas: A Memoir of a Boy Adrift, Balboa Press, →ISBN, page 102