doom plume

a dark lingering mass; usually eminating from a putrid gastric bowel movement; the stench from a black goo that typically leaves its assailant with a 'churnobally' sensation in the gut.

the assailant: "dude, I don't feel so good"

the victim: "omg, what the fuck was that?"

the assailant: "augh, sorry man - I let go of a doom plume"