I want to know if your poop expletive was prompted by rachelmanija's recent entry, or whether it would have been the expletive of choice anyway.

It's a reference to The State's "Tenement" sketch, which I would link if I could find the original on YouTube; the conceit is that it's a hard-hitting, unvarnished, Arthur Miller-esque drama of working-class life which the cast is being obliged to perform in a G-rated version for TV, so that among other euphemized surrealism one character gives vent to their existential angst with a great howl of "POOOOOOOOOOOOP!"