whereisroom3204's definitions
An impromptu gathering of people (usually otaku) to engage in group masterbation while watching hentai films.
After not seeing his Otaku friends for over 3 years they went straight from the airport to the watermelon party.
by whereisroom3204 March 2, 2015
 Get the Watermelon Partymug.
Get the Watermelon Partymug.