According to Dan Cummins, Master

Reverend Prophet of Nimrod, God of Timesuck, Mcgill's Pop is when your dysentery or diaharrea is so aggressive that you literally shit your asshole off creating an audible "pop".
Cholera caused Steve's dysentery to be so bad he suffered Mcgill's Pop and died.
by DurkeyDurk January 14, 2022
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