from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Sports Vulnerability of a boxer to a knockout punch.
  • noun Vulnerability, especially of a public figure, to destructive criticism.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A sensitive chin or jaw, the physical striking of which tends to result in a knockout.


from Wiktionary, Creative Commons Attribution/Share-Alike License

An allusion to the fact that glass is easily breakable.


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  • Palooka sure didn't have one! :oD

    July 28, 2007

  • A boxer's susceptibility to being knocked out. See citation on tomato ear.

    July 31, 2008