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When the toilet is so backed up from your roomate taking giant brick shits that you are forced to shit in a plastic grocery bag and throw it into your roomates room
by lerxst88 April 27, 2009
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An expression to describe frustration with an idea or a situation that is equivalent to needing to taking a shit without a toilet.
Rory: "Courtney, we missed our bus stop."
Courtney:" Well, I'll just shit in a bag..."
by Luke1705 April 15, 2017
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McDonald's food or either by consequence Burger King's too.

Have a nice dinner mate!
Jim: hey man! let's go eat shit in a bag
Guy 2: Yeah let's go to McDonald's
Jim: Maybe.... but i still preffer Burger King's shit
by dani_red5 June 30, 2008
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