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The act of masturbation - applies to both the male and female gender. May involve one or several people.
"Dude, last night I totally had a handparty in your sister's room."
by JasonFasho January 19, 2009

originating from the 2006 film "BORAT: Cultural Learnings of America For Make Benefit Glorious Nation of Kazakstan"
"you make hand party with my pamela!!!"
by dunkfunk November 11, 2006
(n): Masturbation, jacking off
I like to have a hand-party while I look at pornography!
by DivaD91 November 24, 2006
Hand party is a rough translation of male masturbation from Kazakh to English by the Kazakhstani journalist Borat.
Borat: "My favourite television program is your Home and Aways. I like very much to make hand party over your women in their water panties."
by Scobar November 13, 2006