A bachelor party (USA, Canada and South Africa), also known as a stag party, stag night or stag do (United States, Canada, UK, Ireland and New Zealand), a bull's party (South Africa), and a buck's party or buck's night (Australia) is a party held for a bachelor shortly before he enters marriage, to make the most of his final opportunity to engage in activities a new partner might not approve of, or merely to spend time with his male friends (who are often in his wedding party afterwards).
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