Mason Dixon Line 

The boundary between Maryland and Pennsylvania. A symbolic dividing line between the North and the South before the Civil War. The two surveyors who mapped the line, Charles Mason and Jeremiah Dixon, are the namesake for the imaginary border.

Once you've crossed the Mason Dixon line headed North, you're not likley to find a Waffle House.

Mason Dixon Line by ebradfor November 12, 2005

Mason-Dixon seam 

The seam in the middle of boxers that gets caught in between a males junk and inner thigh, usualy resulting in an irritation or some discomfort.

Two guys on treadmills:
guy1: agh, I'm getting a real Mason-Dixon seam.
guy2: yea I hear that man.
guy1: I think I'm gonna go settle this civil war style.
guy2: yea I'll prob be there soon but um, my balls have yet to succed from the union.

Mason-Dixon seam by Robie D. March 21, 2008

Mason-Dixon Line 

Doing a line of cocaine in the area between a girls Asshole and her vagina. The line represents the seperation of the pussys of the North and the Assholes of the South during the Civil war.

Ex. "Dude last night you totally did a Mason-Dixon Line of that hooker!"

Mason-Dixon Line by Megatron81 July 6, 2014

Mason-Dixon line 

Anywhere that defines a specific boundary, especially regarding someone's body or personal space.

"Keep your hands above the Mason-Dixon line, thanks."

Mason-Dixon line by TheMocker December 30, 2013

Mason-Dixon Line 

A latitude line in the United States which divides Idiots and Assholes

Goddamnit Johnathan! How can I get away from all these Assholes? Easy Thomas' ... Simply drive your beamer across the Mason-Dixon Line till you start running into Idiots!

Mason-Dixon Line by StuPedasso May 10, 2012

Mason Dixon Line 

The "mason dixon line" is a common metaphor used to describe a separation, usually directional (north or south). It can also be used to describe other separations such as above and below the waist.

Geographically speaking, one could say: "The mason dixon line separates the yanks (people who stereotype everyone and think the nation should have voted for Kerry or Frankenstein, which ever you prefer) from those who are more refined and choose not to cry about such trivialities as who is the president (he is more symbolic than political anyways).

Mason Dixon Line by someone from the south May 2, 2006

Mason-Dixon Snowstorm 

A sexual act, consisting of brushing dandruff from your pubic hair onto a girls face after she has finished giving you a blowjob.

Frank: "How did your date last night go?"
Paul: "Man, it was awesome! We went back to my double wide, and she let me give her a Mason-Dixon Snowstorm!"

Mason-Dixon Snowstorm by ShopMonkey March 10, 2022