In the UK we say "a hen party" = a party for girls/women only the night before a girls/woman's wedding. In the UK we say "a stag party" for a party for boys/men only the night before a boys/man's wedding You will have to wait for an American to answer from an American perspective. " My bachelor party could also mean as well that the film is for the maker to receive a B.A honors degree" Bachelor of Arts degree from a college/university. so there may be a double meaning in the quote

Thank you very much, Aud. You're right. It was a movie made by a coworker of Jerry to show it in his bachelor party.

I found the quote from this movie, it says 'bachelor party film'. It's a party for a groom and his male friends before the wedding. The groom is a man who is going to get married or has just got married. I don't know which bachelor party Tom Cruise is talking about there, as I haven't seen this movie, sorry)