In Reply to: Why I outta posted by ESC on January 14, 2009 at 12:06:
: : Where did the phrase "why I outta", slang for "why I aught to", come from?
: I've heard it said in old movies. I'll check my catchphrase books and see if there is a particular movie or character associated with the phrase.
Actually it's "why, I oughta--", from "why, I ought to--" and the physical threat goes unspoken.
The construction is called an aposiopesis, which arises when the 'if- clause' or protasis of a condition is stated without an ensuing 'then- clause' or apodosis. [Source: Wikipedia entry for Aposiopesis]