pack mules 

The people who do the jobs and get the work done, that an organization needs to survive. A good boss like a good mule skinner is very concerned with the welfare of his mules because he knows his lively hood depends on them.

Bob really went to bat for our raises he knows good pack mules are hard to find.

pack mules by knowman March 17, 2008

Packmule 

A person who kills all fun whatsoever and is extremely sensitive to all types of insulte towards them, big or small. They're basically a cross between a buzz kill and a bitch. They also overuse every single joke ever made.

"Hey, packmule, what's up?"
"GOD DAMN IT STOP CALLING ME A PACKMULE!!!"
This is the sensitivity part

"Hahaha, my dog can do a trick."
"My dog has cancer."
BUZZKILL

Whoop that trick becomes a popular saying. A packmule says it at least 10 times per minute and makes it completely not fun in anywhere from 6 to 16 days.

Packmule by I freakin' rock November 14, 2006

packmule 

1. A mule of the pack.

2. A reliable peson that gives you packmule rides. Feed them oats every 5 hours.

I fed my packmule her oats for the day.

packmule by Cecile August 14, 2003