bachelor party 
(or bachelorette party)
noun North American
A party given for a man (or woman) about to get married, typically attended by men (or women) only.Alex has a bachelor party to attend on Saturday....
- And then of course the boys must attend the bachelor party, we wouldn't think of leaving you out!
- Later in the week, I was to attend a bachelor party for a friend of mine.
- ascorbic acid
- ascot
- ascot tie
- ascribable
- ascribe
- ascription
- as cross as two sticks
- ascus
- ASD
- (as) daft as a brush
- (as) dead as a doornail
- (as) dead as a (or the) dodo
- (as) dead as mutton
- (as) deaf as a post
- ASDIC
- as different as (or like) chalk and cheese
- (as) drunk as a lord (or skunk)
- (as) dry as a bone
- (as) dry as a Pommy's towel
- (as) dry as dust
- (as) dull as dishwater (or ditchwater)
- -ase
- ASEAN
- (as) easy as falling off a log
- (as) easy as pie