Definitions

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

  • noun humorous The fraction of time between making a mistake and realizing it.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

oh no +‎ second, in imitation of terms like nanosecond and attosecond.

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Examples

  • QUEST: The ohnosecond is the length of time it takes you to push the send button by accident on an e-mail.

    CNN Transcript Mar 7, 2003 2003

Comments

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  • A definition from www.urbandictionary.com

    "That minuscule fraction of time it takes your brain to realize that you've just made a GIGANTIC mistake and reconcile the fact that it is too late."

    -Buzz M.

    January 8, 2008

  • Like the nanosecond before you lock your keys in your car?

    January 8, 2008

  • Or the nanosecond you realize you clicked "send" and copied your boss by accident?

    January 8, 2008

  • Beautifully expressive!

    Has anybody else come across the expression "New York Second" - again a fraction of a second, defined as the time it takes the man in the car behind yours to sound his horn when the traffic lights turn green and you haven't reacted.

    January 9, 2008

  • I've not only heard the expression, Misterpolly, but I've also experienced that--only it was in Philadelphia, so I guess one could call it a Philadelphia second. Just a splinter longer than the NY version. ;-)

    January 9, 2008