An umptie is anything that will fuck you up. Alcohol, Marijuana, Acid, things like that. But it is a secretive term...shhhhh!
by Ross Mofuckin' L July 5, 2006
Get the Umpties mug.by PaulK May 25, 2013
Get the Umpsies mug.by Jskillz June 2, 2005
Get the umphies mug.