It originated from the term "I'll be back in a flash", but with the word "flash" replaced with "flask". It gives a double meaning now, where you can say "I'll be back soon" and also "I'll be back inside an alcohol containing vessel".
by lerppu July 26, 2004

Jamie: dude did you see Michela she was a round bottomed flask.
Cristian: i know but what about lianne she was a round bottomed flask too.
Jamie: ye i agree
Wayne:you know personality matter too right
everyone: shut up
Cristian: i know but what about lianne she was a round bottomed flask too.
Jamie: ye i agree
Wayne:you know personality matter too right
everyone: shut up
by short rich man shut up kevin May 27, 2021

by Will 🤫 October 1, 2019

by No hydroflasks October 30, 2019

When a man peas in a water flask and then shoves it up his ass. Then he plays the flute really hard and bubbles the piss. The piss drain into his stomach and he throws up everywhere and shits the flask out which covers him in piss and shit. He then mixes all of his poop,piss, and vomit and Diet Coke into the flask and drinks it, causing his stomach to rupture and bleed out and die. You also have to do this in northern Tennessee
Guy:you here about Connor
Guy 2: yeah I heard, he did the Northern Tennessee water flask special
Miacheal jorden: jumpsot
Guy 2: yeah I heard, he did the Northern Tennessee water flask special
Miacheal jorden: jumpsot
by Meatwad60 January 25, 2022

A flask you keep in your back pocket to take out and pass around when shit gets boring. (So always) Good for church, school, work, family occasions, funerals ect.
Person 1: This church lunch is so boring!
Person 2: I know right? Lucky for you I always got me trusty booty flask!
Person 2: I know right? Lucky for you I always got me trusty booty flask!
by THE OLD SCHOOLER December 1, 2018

by Mooseman313 October 21, 2017
