This picturesque expression was originally used by Rednecks in the USA, but has achieved wider usage due to combined operations of US and European troops. It is used to describe something that totally futile, a waste of time and effort and something that you do not wish to do. By extension it can be applied to mean a person who is a waste of time and effort, someone with whom you do not wish to associate and whose existence can only be described as one of nature's biggest mistakes..
Malcolm's made another great and glorious cock-up, that asshole really is no more use than whistling up a pig's ass!
by Croatalin April 26, 2014
Get the Whistling up a pig's assmug. Be sure to bring an umbrella, the weatherman said there's a 70% chance that it will be raining up a dog's ass by this evening.
by AtomicSquid February 2, 2010
Get the Raining up a dog's assmug. by Magic carpet June 10, 2017
Get the Up your own assmug. A conjunction of all up in my grill and on my ass.
An uncomfortable situation when multiple people are telling you what to do. (up in my business
An uncomfortable situation when multiple people are telling you what to do. (up in my business
by Shelley1999 February 18, 2009
Get the All up in my assmug. 
A conjunction of all up in my grill and on my ass.
An uncomfortable situation when multiple people are telling you what to do. (up in my business
An uncomfortable situation when multiple people are telling you what to do. (up in my business
by Shelley199 April 4, 2009
Get the All up in my assmug. A form of saying you have so much of something, you literally have to say "up the ass." When using "up the ass" pronounce "the" as "thee".
by Corzocl April 13, 2006
Get the up the assmug.