Originally a Hebrew word, popularized in English by the cartoonist Herb Gardner. A `sad sack,' a loser, a person who can't make any thing or any situation work right for him or her; unassertive, shy, timid. Reference: `The Joys of Yiddish,' by Leo Rosten. His definition is "An innocuous, ineffectual, weak, helpless or hapless unfortunate." There are other spellings also.
The poor little fourth-grader was such a nebbish that she peed in her pants, rather than speaking up and asking the teacher for a hall pass to go to the bathroom.
by Chuck Hastings June 30, 2003
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Describes a person who, when they leave a room, makes those remaining in the room, feel like somebody just walked in
Wow thats a relief - the nebbish has gone
by Poppette May 9, 2016
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1) An unitelligent person

or

2) A knobbily cabbage
1) "Ugh, my teacher is such a nebbish- he thought that Portugal was in South America!"

or

2) "We had nebbish for dinner last night- it was disgusting."
by Write_a_Zoo January 10, 2010
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A nebbish is an ineffectual person, someone timid, submissive, weak, helpless or hapless, a nonentity. He's unlucky, but mainly because he’s a loser right through to the core.

It’s an adjective formed from one of the most characteristic of Yiddish words. It was originally "nebech". In Yiddish it was originally an interjection, roughly meaning “You poor thing!”. Americans had trouble saying this word when it first appeared in the English language at the end of the nineteenth century, and they changed it to nebbish, with nebbishy as the much less common adjective.
Sarah: "He just sits there, and every time I make a suggestion, he goes with it, but mostly because he doesn't understand what I'm saying and has no dang opinion for himself!"
Marie: "Gosh, he's so nebbish."
by Wone1568 April 11, 2011
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when somthing smells nebish it often refers to the putrid smell of neb. Nebbish smells often are caused by a constant lack of showers, deoderant, and body wask. Once you enherit the smell it is almost impossible to remove it off your body. It is the most powerful substance in the world. If smelt, it could be fatal for that person.
Mark: Hi Coleen.
Coleen: Hi Mark.
Mark: What is that horrible nebbish odor?
Coleen: What do you mean?
Mark: It smells like you had just baved in a 500,000 ton pile of horse shit. Must be Neb.

Nebbish/Neb
by BOSnd417 March 17, 2010
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The equivalent of a Star Trek Redshirt, these ominous looking people are usually dressed in black tactical gear (but also can be in street clothes.)Their only purpose is to be killed by the protagonist (if they are protecting the bad guys) or killed by the antagonist or his minions (if they are protecting the Good Guys). It is pointless having them around in either situation because their main use is to plug up gaping plot holes in an idiotic movie.
"Man, look at all of that firepower!"
"Most of them are Security Nebbishes so they won't be able to harm us."
by CryHavoc July 17, 2019
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