Ass Cloud 

a cloud of smelly fart(s).
usually left as a present to oncoming passers.

see:fart knocker

Al: What's that smell, Johnny?
Johnny: I believe we just entered an Ass Cloud.

Ass Cloud by Zorlock April 21, 2005

ass cloud 

All of the rude/foul/unpleasant things you have thought of saying, but kept to yourself in your mind.

Guy 1: That was really mean. Where would you get an idea like that about your mother?

Guy 2: I kept it stored away in my ass cloud for the perfect moment.

ass cloud by The goddamn Batman November 15, 2013

Volcanic ass cloud 

The cloud created from a plume of volcanic ash.

Roxanne: Yeandle why aren't you on holiday?
Yeandle: That damn Volcanic Ass Cloud caused my flight to be canceled.

Volcanic ass cloud by boycey1 April 22, 2010