I only know it as ‘bachelor party’ – now my mind have expanded thanks to
Sherlock Season 03!
According to wikipedia.org:
bachelor party (in the United States), also known as a stag party, stag night, stag do (in Great Britain, Ireland, and Canada), a bull’s party (South Africa); a buck’s party or buck’s night (in Australia)
Or a hag do (UK) that is for both bride and groom.
Continue reading the article to see what they call it in Germany!
Junggesellenabschied (say that 3x fast!)