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California police code for a "crazy". Also the name of Eddie Van Halen's home recording studio... and a name of a Van Halen CD.
No example is needed.
51-50 by VHFan November 13, 2003
Words you can keep
A group of mentally retarded children who think they are special for sitting in a GM's pocket.
What an idiot...must be part of the 51-50.
51-50 by Anyone Respectable July 15, 2004
when yo ass goes fuccin crazy an kills sombody
we got a 51-50 down on 1st street
51-50 by Fatal November 11, 2003
1. Police code for a person that is a danger to him/herself.

2. Often used by gangster and thugs as a person that is psycho enough to put his/her or anyone else's life on the line.

3. Can be a reference to a trance like episode were the person doesn't care about the law, life or anything around.
1. "I'm going to need assistance with a 51 50 on 12th st." - officer Doofy

2. Miss 5150 is a hot piece but I heard that she is straight up psycho and she is down for that BLU flag.

3. That slob better quit clowning or I'm going to have to go 51 50 on his ass.
51 50 by The EVIL BATMAN March 29, 2010
When your labeled by police or doctors as being an endangerment to yourself and others. Once labeled as 51/50, you get taken to a pysch ward for a 72 hour hold to see if your mentally stable.
He threatened to beat up his parents, so they called the cops & they 51/50'd him.
51/50 by jdmvero April 5, 2010
police code meaning crazy and violent. often used as slang meaning the same.
cop: "we have a 51/50 here. im gonna need backup."

----------
person: "that dude's a fucking 51/50. dont mess with him."
51/50 by Kennedi Greene August 27, 2007
Someone who the police, with their poor grasp of psychology, think is a danger to themselves or others. They will generally yell at someone and if they yell back enough, declare them a 51/50. FUCK THE POLICE.
I was in the hospital and some big angry police guy yelled at me and I yelled back, so they gave me the 51/50.
51/50 by Downvoting Victim October 20, 2009
More from Urban Dictionary

Salad Days 

green inexperienced youthful judgement and cold blooded execution of those judgements.

Rashness with little concern of consequence.

Antony and Cleopatra. William Shakespeare

"My salad days,
When I was green in judgment, cold in blood."

- William Shakespeare, Antony and Cleopatra, 1.5
"How did you end up in jail?"

"Salad days, 'nuf said."
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Word of the Day on August 28, 2026

age gate 

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Bill: "Fucking age gate! *quick scroll* THERE! I was born on January 1, 1904. Fuck you age gate."
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board chow 

A)
The Crud that collects under the keys in a keyboard. Usually more severe in the keyboards of programmers and webmasters as they tend to spend a lot of time at the the computer and thus eat at their desk. Mainly affecting IBM Model M (clicly) style boards.

B)
Can also be used to gross out Non-Techie people
A)
Bill: want to go to the club?
Bob: No, I've got to clean out my board chow, keys are starting to stick.

B)
Bill: Want to go out to get a bite?
Bob: No, i am just going to have some of my board chow/
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Bob: The food scraps that collect in my keyboard; Want some?
Bill: *GAG* *HURL* *GAG*
board chow by BinaryHackerMan September 3, 2007
Word of the Day on August 26, 2026

young pup 

a young person, a young adult in their late teens/early 20s.
Ah, you're just a young pup at 23!
young pup by the dog May 30, 2006
Word of the Day on August 25, 2026
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