a measure of capacity equal to 109 US fL oz (equivalent to 3.22351472 L or 9 12 fl oz American cans of beer ), used for beer inside the compton garage, located in Southern California.
Greg- WTF do you mean a bag of beer? That's not a unit of measurement!

Carlos- Need a Snickers ?
Luis- Yes it is... it's nine beers per bag.
by witeboy007 May 30, 2015
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Beer that is kept in some kind of bag, mostly back packs and messenger bags.
Ben: You want a beer?
John: Nah, I got bag beer.
by smashedwindshield January 24, 2010
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The essentials for watching a particular event. A "bag chair" is a folding, portable camp chair that can be taken anywhere and set up instantly, your "beer" is your relaxation beverage of choice.

When an event promises to be interesting and worth watching, you go get your bag chair and a beer, then settle in and observe!
Ralph: Boss just found out about Mike leaving early the last couple days, he's looking for him to chew his ass out.

Ed: Oh-h-h-h-h I gotta see this!

Ralph: Yep, gonna get my bag chair and a beer ...

- - - - - - - -

T: Oh man, I think Jen and Amy are all drunked up and checking each other out

E: M-m-m-m-m they'll be sneaking off and going at it before you know it

T: Yep. Gotta get my bag chair and a beer ...
by OldFart77 November 7, 2010
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