A Ninja Typo is a punctuation or grammatical error that does not reveal itself to the author (no matter how hard the author looks for it) until it is too late (i.e. after it has been published in a way that cannot be retracted).
Example : Dang! I proofread this email 3 times and I STILL managed to leave the "l" out of "turtle". That Ninja Typo just killed my chances of getting re-elected.
by Mank002 October 22, 2014
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A fictional demon who lives in your keyboard and causes typos. Also the father of 1337 speak.
I fucked that sentance up. DAMN YOU TYPO DEMON!
by Chris Jeffery June 4, 2006
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When spelling checker fails to pick up an incorrect word because the word, though incorrect in your sentence, was actually a real word in itself.

These require serious proof reading to find, as they won't be underlined in red, however, it's worth doing because they can make a HUGE difference to what it is you were trying to say...
The pseudo-typo is a real word that is inappropriately placed:

Innocuous:
"We all lined up on the star line."
(We all lined up on the starT line)

Disastrous:
"If you do that again, I'm going to come down there and kiss your ass!"
(If you do that again, I'm going to come down there and kiCK your ass!)

Example:
"I wrote to my boss and made an horrific pseudo-typo, instead of saying I'd like to kill him, I said I'd like to kiss him and now we have a date on Wednesday :( "
by LabMom March 1, 2010
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The act of making continuous typo's while trying to correct the first one you made online.
(Internet)
Person 1: Yeah I was backing something today.
Person 2:What?
Person 1:Oops I meant backing*
Person 1 (again):Baking*

Person 2: What a typo chain.
by TypoFail July 10, 2011
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Someone who emphatically corrects others spelling errors in a public arena such as in a chat room or discussion board. The typo nazi then abruptly leaves the conversation with a dismissive and unbelieving attitude about the misspelled conversation.
Today a tech giant made splahing news comments regarding it's new lineup of gadgets. Notice the missing "S" in splashing.

Reply: Typo Nazi

The author of this article is dumb. This article isn't even spelled right! Bah why should I even read it.
by Ralph_P June 24, 2013
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A typo (one-letter keyboarding mistake, typewriter mistake) that the spell-check function cannot pick up because the word is spelled correctly -- although not for the word you wanted to key in. They are called "atomic typos" because the change of just one letter completely changes the word, although it remains spelled correctly in terms of the spell check function
Examples:

Chris, instead of Christ
war, instead of was
bite, instead of byte
massage, instead of message

Quote: "Wow, the newspaper had an atomic typo on the front page, the writer meant to say "message" but what appeared in the article was "massage". Oops! That's a real atomic typo, and there's very little one can do to stop them!"
by PRwiz101 May 15, 2009
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An evil little critter that haunts the internet and makes otherwise smart people who know how to type look like idiots.
I knop what you mena!

The typo fairy strikes again.
by xxdarkseraphxx August 4, 2005
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