flash party 

A strange phenomenon wherein a group of people plans a secret event to take place at a public location. The planning usually occurs online. Flash parties are usually silly, fun affairs.

A bunch of anime fans suddenly showed up at McDonald's wearing blue afro wigs and singing strange Japanese songs... flash party in action!

flash party by Doc Sigma September 24, 2003

Flash Party 

All of a sudden a small group of people become intoxicated, dance, then sober up and leave within a few hours.

"WOOOOOOOO FLASH PARTY! Okay bye, see you later."

Flash Party by GnomeyMclovin June 9, 2009

Flash Party 

A social gathering on an "off night" of the week, usually at a bar or someone's house/apt, that starts out small but suddenly, unintentionally, and randomly reaches critical mass and turns into drunken mayhem.

"Last night McHugh and I went to the pub to have a few beers, but then people randomly started showing up and it turned into a flash party. Some Excedrin would be good about now."

Flash Party by NDFitz May 1, 2006

Flash Party 

A party consisting of primarily homosexual men wearing very little clothing, flashing their private parts to anyone who is there to see.

I just got back from Trevor's Flash Party, I didn't know Marco was packing so much!

Flash Party by TruckerTuck June 19, 2023

flesh party 

A name for a friend group of truly interesting critters that inhabit the internet

Man those flesh party kids are fucking weirdos

flesh party by Sushigore March 6, 2023

Panty flash 

When a guy shows the waist band and brand of his panties above his jeans

He panty flashed his Calvin Klein’s while looking hot in his jeans

Panty flash by MF_skydiva November 20, 2020