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book smart

The general definition of book smart is someone who is intelligent and very well educated academically. However, the term is usually used to contrast and compare with another term known as "street smart".

The stereotype of a book smart person is someone who is upper-class and well educated but less knowledgeable when it comes to handling important situations faced in bad neighborhoods and lower-class city areas (a.k.a. the streets). However, the stereotype of a street smart person is someone who is intelligent and knows how to handle important situations in the streets but is not as well-educated academically.
The more extreme and negative stereotypes are that book smart people are naive, easily manipulated, and have bad judgment in bad situations, while street smart people are unintelligent and incapable of achieving a higher education.

Both stereotypes aren't always true and any semblance of them are only due to different lifestyles and experiences.
Josh: Are you sure me and Jason will get along? Jason is street smart and I'm book smart. We will probably be very different from each other.

Mike: Nah, don't worry. Jason may be street smart but he is also book smart. I'm sure you two will have a lot in common.
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Smart Casual

A nonsensical dress code that people slap onto events, parties, and workplaces.

Completely down to interpretation; this always causes confusion and often spectacular results.

A mixture between smart and casual - should not be taken literally.
Andy- "What's the dress code tonight?"
Bob- "Smart Casual"
Andy- "Well what the hell does that mean?!"

Jim- "Hey, is Andy wearing jogging bottoms with that blazer?!"
Bob- "Yeah it's Smart Casual"
by confusedncold March 29, 2013
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smartassery

Please cease and desist from all your smartassery.
by Dtcamero May 16, 2005
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smarthole

Someone who is both a smartass and an asshole.
Chris is such a smarthole!
by crogue October 14, 2011
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Smart kid

That one kid that when the teacher says “groups” it’s (most times) the first kid that you look at and some other people too. And you probably don't know his name.
Teacher: Okay class now this project we are gonna do it in groups.
Jake: I wanna be with the smart kid!
Bob: No, I am going to go with him!
Smart kid: alright imma head out
by Randomguyintheworld December 29, 2019
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Smart man's liquid nitrogen

Smart man's liquid nitrogen is dry ice mixed with 1,1-Difluoroethane. The boiling point of 1,1-difluoroethane is -11.29°F (-24.05°C) while it's melting point is -178.6°F (-117°C). The sublimation point (the point at which a substance sublimes, or goes from a solid directly to a gas) of dry ice (solid carbon dioxide) is -109.2°F (-78.46°C). Smart man's liquid nitrogen stays at around -78°C as long as you keep supplying more dry ice. Then the dry ice runs out and it heats up until it reaches -25°C where it becomes homeless man's liquid nitrogen. Then the 1,1-Difluroethane (can be found in computer duster) slowly boils away until it becomes gaseous 1,1-Difluoroethane. You can keep chemical reactions cool with smart man's liquid nitrogen and once it becomes homeless man's liquid nitrogen, you can use a funnel and a plastic soda bottle to store the liquid difluoroethane under pressure and label it and put it in the lab freezer.
I kept my chemical reaction extra cool with smart man's liquid nitrogen.
by HawaiianPunch1 September 3, 2023
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too smart by half

To be "too smart by half" (also common is "too clever by half") is to be too smart for one's own good, meant either literally or ironically. As an idiom, it is usually sarcastic. The phrase has a wide range of potential uses; for instance, it can mean:

1.) Something so complex that it's self-obfuscating.
2.) A seemingly clever action that is in fact foolish.
3.) Logically accepting something as necessary that isn't.
4.) Overanalysis.
5.) Elitism (see ivory tower).
--"Those Harvard scholars are too smart by half."

--"What a dumb idea; I tell you, that guy is too smart by half."
by GBAAD May 3, 2006
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