Horse's Mule
A person, or persons, who is being a real downer on the group him/her is in.
"..you know that's not how it works.."
"you know what Steve? you're being a real Horse's mule!"
"you know what Steve? you're being a real Horse's mule!"
white sock mule horse
A white sock mule horse is when you cant drive a vehicle worth a f*ck and you wreck on the way
Chaz was on his way to work and somehow managed to hit a white sock mule horse