A fecal yet hygienic act that involves one turning away from the shower head and pooping towards the drain while taking a shower, typically in a squatting fashion. It is the most economically efficient way to bathe and poop.
Me: What is taking Caleb so long in the bathroom?
Dave: I dunno, I think he's taking a poop bath.
When some stupid motherfucker takes a shower and then immediately shits afterward, stinking up the rest of their day and everyone who comes into contact with them.
Person 1: "Did you smell that guy today? I think he soiled himself!"
Person 2: "That's my roommate. I think he pulled a bath then poop."