Smarts is a slang term for the knowledge and intellegence every person needs to get along in life. It is are divided into two equally important catagories: Street Smarts and Book Smarts.

Street Smarts are based mostly on common sense and include things such as the ability to interact well in social situations, argue a point in order to get your way, or even lie your ass off if necessary and not get caught while still being able to recognize when someone else is lying.

Book Smarts are more about the knowledge and experience that are developed in school as a kid as well as throughout life. Much of the knowledge that is attributed to book smarts comes from reading (hence the name), but a large amount of it also comes from simple observation of everyday situations.
Jimmy used his street smarts to talk a cop out of giving him a speeding ticket.

Herold used his book smarts to impress the neighbors by quoting Shakespeare.
by shoop August 13, 2006
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Smart: a person who looks past superficiality as means of purpose; one who makes sound judgment, uses distinct affective words to express themselves, and knows when to keep Fuc*in quiet!
When the time came to talk to the guy she had a crush on, she was smart with her tactics and thoroughly occupied his attention.
by Gloria Chavez July 14, 2009
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To have or cause a pain, normally sharp stinging pain
I banged my ankle on my computer. It smarted a little.

by Casa Dilla June 18, 2008
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1) to be/act intelligent
2) to be learned, but not able to integrate that knowledge into everyday use (intelligent), often used as a concatenation: book-smart, street-smart, brick-smart
3) to dress in a coordinated or fashionable manner, See: look sharp
4) (intrans. verb) to hurt or cause pain
1) That japanese kid is smart. He got his PHD before he was 20.
2) Jennifer is finally loosening up. Back in high school she was just too book-smart and had no clue about what was going on.
3) Hey Swaggart, thats a smart looking suit you've got on.
4) Ouch, a paper cut... that smarts!
by pythonspam November 7, 2003
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he two of them looked smart with their new shoes and clothes
by CballANDnhoney October 26, 2008
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Smelly mouth and rotten teeth
Nathan is very smart
by XXjjh December 22, 2020
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This is probably not what you are if you had to come to urban dictionary to look this word up.
Urban Dictionary Edgy Kid: Eye ham barry sem art.
Me: Whatever you say, smartypants
by EpicCollision January 4, 2018
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