Briefcased 

In British slang it refers to being hungover from partying/drinking all night. It takes after the concept of the durability of a locked briefcase, being able to drink all night and keep going.

D: "My God, that club last night was the dogs bollocks."
E: "I know. It was wicked. Today I am completely briefcased."

Briefcased by Rockafrosh November 8, 2011

Negaunee Briefcase 

A Negaunee briefcase is a term used to describe a 24 pack case of cheap beer such as Labatt Blue. In the rough-and-tumble mining towns of Michigan's Upper Peninsula, people overconsume cheap beer on a daily basis. A Negaunee briefcase is perfect for your next business meeting in Upper Michigan. First coined by geographers at NMU in 2008.

The three of us Yoopers pooled our money and bought a Negaunee briefcase to drink while sitting on the shore of Lake Superior. At 24 cans, we each have 8 cans to consume in the next couple of hours. If we wanted to drink more, we would've bought the 30-pack of Labatt Blue, occasionally referred to as an Ishpeming briefcase.

Negaunee Briefcase by mtu=sausagefest May 14, 2009

Briefcase Monger 

A watcher of the Wafflin’ podcast

Are you really a Briefcase Monger if you don’t watch every Sunday - ya know.

Briefcase Monger by Waffler123456 April 25, 2021

Briefcase Buddies 

A term used by Sam-I-Am showing his excitement that he and his new "bestfriend" have matching briefcases. "Briefcase Buddies" is a term coming from the show "Green Eggs and Ham" marking the "friendship" of Sam-I-Am and Guy-Am-I.

Sam-I-Am: Oh wow! Look at this! We're BRIEFCASE BUDDIES!!! It's like finding a matching so flake...
Guy-Am-I: It's an Unremarkable attaché, sold in most major stores.
Sam-I-Am: AND WE BOTH BOUGHT IT!!!

Briefcase Buddies by terribly_innaccurate May 19, 2021

Internal briefcase 

The type of turd which is so vast and substantial that relieving yourself of it is comparable to putting down a heavy briefcase you have been carrying all day.

Person 1: 'Hey are you ok? Whilst you were upstairs I heard a colossal thump.'

Person 2: 'Don't worry, I just dropped my internal briefcase.'

Internal briefcase by freshpot September 9, 2011

Bridgewater Briefcase

An alternative name for a cask of wine, named after Bridgewater in Tasmania where a large proportion of the population are unemployed and spend their days drinking cheap alcohol, taking drugs and stealing cars.

Dazza was quite the man when he strutted down the street on dole day with his Bridgewater Briefcase and carton of Winnie Blues

Bridgewater Briefcase by eyemhere November 3, 2009

Fishtown briefcase 

A 30 pack of cheap American beer, such as as Keystone or Busch, named in honor of the working class neighborhood that's northeast of Center City, Philadelphia.

Stop by the beer distributor and pick up some Fishtown briefcases. Get some Lord Chesterfield Ale while your at it.

Fishtown briefcase by fesak September 2, 2010