(1)a party for those about to be wed; sometimes called a stag & doe (its like a shower, except that only women are invited to a shower)
(2)a gathering of males and females, who masturbate in front of each other for mutual stimulation and enjoyment. (looking is encouraged but touching is not)
(3)when a man and a woman get together to masturbate in front of each other for mutual stimulation and enjoyment.Look but don't touch.See friends with benefits
.With reference to the nursery rhyme Jack and Jill.
(1)Last weekend my wife and I went to a Jack and Jill party for Greg and Julie who are getting married in 6 weeks.
(2)Last weekend my wife and I went to a Jack and Jill party; she got off with some guy who jacked off his 9 or 10 inch dick in front of her, and now she's in another world most of the time.
(3)Nancii and I pulled a Jack and Jill last weekend; we've never had sex, never masturbated each other, but we're comfortable just getting ourselves off in each others' company.She's a hottie
and I find she certainly beats fantasizing.