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1.
(n.) A person who signs up or talks about attending certain events, but never shows up.

Fred: Hey, where is Bob? I have his name here on the sign up sheet.

Lindsey: Man, that tool Bob never comes when he says he will. What a no show.
by trongee December 18, 2007
 
2.
1. Verb: To not show up to an event/work/etcetera

2. Noun: Someone who does not show up to an event/work/etcetera
1. He was supposed to come to work today, but because he had a hangover, he no-showed.

2. He was supposed to come to work today, but because he had a hangover, he was a no-show.
by H.M. Switz February 20, 2009
 
3.
v., to not show up. Basically it's the verb form of the noun phrase "no show".
He noshowed for band practice... AGAIN...
by Neven Mrgan January 18, 2003
 
4.
Spurious claim made by a recalcitrant party that an impasse results from past-actions of another party when that other party is open to new attempts.
-- So she thought he lacked fomo.

-- Yeah, but, really, he was nogo.

-- And now he's all for not pretext-dwelling on past-cases, but she still takes an obstructionist noshow position.
by sukadog April 14, 2011
 
5.
one who proclaims a particular ethic or commitment yet whose choices and behavior patterns prove otherwise. Similar in type to a hypocrite, "no-show" labels someone as untrustworthy, unstable and purposefully two-faced.
"He professes to be such a Chrisitan yet he is a no-show to his family and friends and only thinks of himself."

"Mr. Jones gives a ton of money and time to charity but is a no-show to his wife, his kids and his church."
by DLS2 February 22, 2007
 
6.
(n.) A person or object that fails to turn up when it has been arranged to appear.
Adolf Hitler: Those jews were a no show for thier shower today.


Rommel: I guess they thought better never than late, eh?


Adolf Hitler: Yeah.
by Kung-Fu Jesus June 15, 2004