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1.
Refers to an instance when one goes to release a fart and ends up sharting his/herself. The person then vomits as a result of the disgust from the sharting. To acheive a Scottsdale 1-2, the shart (1) must come before the ralphing (2).
I had Taco Bell for my last six meals, the Scottsdale 1-2 was virtually inevitable.

I totally pulled a Scottsdale 1-2 in class and blamed it on the fat chick next to me.
by Reggie Stallwater November 02, 2010