Definitions by My Fist

The Old 1-2 

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.

The Old 1-2 by My Fist July 16, 2008