An old English name with even older Nordic roots. It's derived from the Old Norse word "Kolbyr", which means "cold settlement". Also a kind of cheese, but don't bother joking about it with someone named Colby. I guarantee you they've already heard it.

You might not want to name your kid this if you live in the southern U.S. People there have a habit of saying "Koby" instead, and it might drive them nuts.
A lot of these definitions for "Colby" are obviously written by some guy who's really insecure about the size of his member.
by Whateverman09 January 3, 2011
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The Term know as Extremely Sexy and Full of Style. often refered to a boy.
That Boy is Colby'in (slang)
Look at that Colby
I want a Colby
by Mike Bc March 7, 2007
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DAMMMM I HAD A COLBY LASY NIGHT HAHAAH THAT COLBY WAS HUGE
by ALSO JACKSON March 14, 2010
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A dude who is a moderate height, has rich dark brown hair and green hazel eyes.
He’s smart enough.
He tends to meme around a lot and hardly take things seriously. Often digs memes into the ground.
He’s nice but once you piss him off you see a whole nother side of him.
You: “Hey Colby random noises aren’t funny”
Colby: “Hegh bagodefuh hdjendjfkfoid!!!”
by Not big gay October 24, 2018
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Lit swag gangster and the hottest most sexiest man you’ll ever see looded b**** always correct and also flexed on people with his phone
That b**** is soo a Colby
by Meee dawggg March 1, 2019
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Colby is a funny but sometimes annoying kid and likes the attention on him and colby is usually a really good boyfriend
Colby is a name
by Hgdfvgfffgg November 13, 2019
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A person who escaped from the Psychiatric hospitals.

That Colby is me.
“Damn boy, that Colby pretty fucking crazy!”
by Idk Colby meaning. March 3, 2020
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