Jack and Jill

English edit

Jack and Jill (plural Jack and Jills)

(chiefly attributive) A bachelor party or bachelorette party to which both men and women are invited.
- 2001, Emily Ehrenstein, Laura Morin, Leah Furman, The Everything Wedding Etiquette Book:
  Men usually aren't as enthusiastic about shower games and the like as women, so “Jack and Jills” have a tendency to turn into regular parties.
(rhyming slang) A bill (as for a restaurant meal).
(rhyming slang) A till (cash register).
(rhyming slang) A hill.
(rhyming slang) A pill, especially the contraceptive pill.