Boomer

An explosive poop that causes the water and/or other debris in the water to splash back on your ass and/or back a.k.a. a boomerang poop

Man, I just had a really explosive boomer in there! Might wanna spray something before you go in!

Ash: You okay? You were in there a while.

Ricky: Yeah, I'm fine. It's just that it was a boomer.

Mark: Oh damn. Yeah, them boomers will get ya.

Dess: OMG!