When you punch someone in the gut, crumpling him over, then punch that person in the face.
Mike Tyson beat him with the old 1-2.

Note -- Also carries ambiguous sexual connotation.

Bill: I gave her the old 1-2.
Ted: ... dude, fucking wifebeater.
by My Fist February 9, 2006
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When a math is close to, if not OBVIOUSLY easy

or you just don't want to help the person finding the answer
Person 1: Arrgh! i just cant get this right, could you please help me?

Person 2: Yeah, 1 + 1 = 2
by TheLittleMe October 4, 2011
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Almost a 69, but she gets fingered while blowing you
I enjoyed the 68 and 1/2 cuz it's easier than 69
by Shocker plus January 17, 2019
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The solution to the equation a + b = c, where a, b, and c are consecutive integers; or where b = a + 1 and c = a + 2.
If 1 + 2 = 3 and 4 + 5 + 6 = 7 + 8 are the first two terms of a sequence of equations, what is the sum of the third equation in the pattern?
by Fasters May 7, 2022
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The most incredible and amazing number. Also a glorious empire.
I am a part of the glorious 4 1/2 empire!
by Djhdgv November 10, 2019
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When two people fight and one of them ends the fight in a two hit combo. Occasionally followed by the 3 4 McGregor.
1.Did you see Dominick finish that guy off with the 1 2 Mayweather?

2.I’m about to hit you with the 1 2 Mayweather.
by Vt_Kobe August 5, 2019
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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 3, 2010
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