| 1. | a social gathering or outing for men only. |
| 2. | a party given a bachelor by his male friends before his marriage, often on the night before the wedding, ranging from a formal gathering to a night of carousing. |
| 3. | a gathering for men only, esp. one for the purpose of watching sexually titillating movies or exhibitions. |
stag-party
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stag party
A social gathering for men exclusively, often involving entertainment considered unsuitable for women. For example, They wanted to give him a stag party before the wedding but John wasn't interested. This idiom uses stag in the sense of "a man unaccompanied by a woman." [c. 1850]