bachelorette party
noun
Definition of bachelorette party
: a party for a woman who is about to be married usually attended by women only Arriving at a second bar where they planned to wind up the night, they found the upper floor occupied by his fiancee, at her own much-rowdier bachelorette party. — Nicholas Kulish
From the M-W Editors
1943
First Known Use of bachelorette party
1943
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