by wastinmoola January 24, 2004

When one uncontrollably falls asleep every time they lay down flat, parallel to the floor, even if it is not a planned "nap time."
Roger: "Hey man, why weren't you in class today?"
Matt: "Dude, i laid down on the couch to watch TV and my horizontal narcolepsy kicked in... woke up 4 hours later."
Matt: "Dude, i laid down on the couch to watch TV and my horizontal narcolepsy kicked in... woke up 4 hours later."
by midleman08 May 11, 2010

by I like chocolate milk. September 6, 2005

by Devon Wostenberg September 13, 2004

by The Return of Light Joker August 5, 2009

John: Damn! Did you see that girl?
L: Yeah that thang swangin, I will go see if she is interested some horizontal refreshment.
L: Yeah that thang swangin, I will go see if she is interested some horizontal refreshment.
by Hell owe December 14, 2014

A shit that is horizontal.
A horizontal shit is essentially a turd that turned sideways while still inside the rectum, forcing it to come out horizontally, often rupturing the anus in the process. It often occurs when one has to keep themselves from defecating for extended periods of time.
A horizontal shit is essentially a turd that turned sideways while still inside the rectum, forcing it to come out horizontally, often rupturing the anus in the process. It often occurs when one has to keep themselves from defecating for extended periods of time.
by LongWangChang September 3, 2016
