When a poo refuses to be flushed down the toilet and makes a final appearance before being flushed again until it is no longer present in the toilet. In many cases this requires multiple flushings and hence, multiple encores.
Fred: What took you so long in the toilet?
Joe: I just did an encore shit, it needed like 5 flushes!

by Vietnam_War_hero August 28, 2006
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When a person takes a shit, assumes they are finished, washes up and then realizes there is more shit coming.
I thought I was don't with my massive deuce, but had to sit back down for an encore shit.
by bokonon82 March 7, 2018
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