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
Get the I'll be back in a flaskmug. 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
Get the round bottomed flaskmug. by Will 🤫 October 1, 2019
Get the National hydro flask daymug. by No hydroflasks October 30, 2019
Get the National yeet hydro flask daymug. 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
Get the Northern Tennessee water flask specialmug. 
Flasking is when you fill a drink with a concoction created by receiving oral sex and making your girl spit it back into a flask. After loading it with jizz, you push it into her pussy till she squirts into it. Then mix it well and drink it up!
by MUNTMEISTER3000 January 10, 2025
Get the Flaskingmug.