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Horrible smelling burps or belches. As opposed to reflux.
(friend burps)
Dis niggas burp`s smell so bad...he must have a bad case of shitflux, already.

by theginth1 March 09, 2008
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Noun: When a town's plumbing has gone out due to storms or natural disaster and the residents must resort to using the surrounding establishments for toilet and showering purposes.
Cashier: Hey, Tom, did you hear? The town across the way lost their plumbing.

Tom: Yeah, I heard. Looks like we're going to have a proper Shitflux on our hands.
by Captain Trap House August 05, 2015
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