The Mule 

A sexual move whereby during doggy style sex the penis, in one swift move, is removed from the vagina and reintroduced into the anus (also known as changing at baker street). The shock causes the recipient's head to rear up at which point the gentleman smacks it down with his fist as one would a miscreant pack animal. Hilarity ensues for all involved. Except possibly for the "mule-ee".

Dave: The girlfriend dumped me last night, mate.

Steve: Really, mate?

Dave: Yep. Tried the mule. She wasn't best pleased.

The Mule by Uncle Twatflaps October 25, 2006

The Mule 

the butt of a gun.
to "hit someone with The Mule" is essentially pistol whipping, but it should be noted that when hitting someone with The Mule only the butt of the gun is used.

"Bitch wouldn't stop running her mouth so I had to hit her with The Mule."

The Mule by D. Wroughton July 27, 2009

The Mule 

An alternative name for a well endowed males genitalia.

As soon as she saw the mule he had her in his bed.

The Mule by lollygaggin September 22, 2012

The Mule 

The tag given to the single 21 year old at a party who's sole function is to retrieve beer for underage people who don't like him.

Toby: You guys want a case? I'm buying if I can stay!

Franklin: Sure toolbag, just hurry I'm thirsty.
(Toby exits)
Franklin: The Mule FTW

The Mule by Birddog Dan February 21, 2011

The Mule 

The Mule (2014): An Australian attempt at crime-drama / toilet-humor, a tale of loyalty, justice and perseverance through adversity as Hugo Weaving explores the question: what use is a search-warrant if you are unable to take a shit?

The Mule was really a shit movie

The Mule by Peculiar Musings March 8, 2015

undress the mule 

An ambiguous term that can be applied to describe something that is open to interpretation, in order to disguise it's true meaning. Used to be vague about the true nature of what is being discussed. The more it doesn't make sense, the better.

Steven: What does 'undress the mule' mean?
Scott: It means to undress the mule.
Steven: How do I undress the mule on undressing the mule?
Scott: Well, what do you think? How would one undress a mule?
Kyle: The more important question is, do you believe?
Steven: Do I believe in undressing the mule?
Kyle: No. Do you believe?
Steven: ...

undress the mule by RRCsteve June 27, 2011

going to meet the mule 

getting ready for/leaving to go to work; bitching about having to go to your job

I'm going to meet the mule. Gonna follow that mule all day long, staring at its butt

going to meet the mule by gravyloaf October 23, 2007