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8.
A unique, crazy, odd little breed of dog, characterized by lethargy, with occasional outbreaks of staring at random objects, and barking at even smaller, more annoying chihuahuas. Colby dogs have been known to jump in swimming pools, (despite their dire objection to taking baths), stare at a blank wall for an hour or so, and it is not at all uncommon for a Colby to sleep up to and including 20 hours a day. Colby dogs can be easily identified by their fluffy blondish coats, (when in the awake position), and while in the sleeping position, if one sees a giant ball of blondish fluff, chances are INCREDIBLY good that they have found a colby dog. Colby dogs are incredibly rare, in fact, there is only one known to be in existence.

OMG! Colby's dead!
wait, no he's not, he's just asleep.
by the colby hunter May 02, 2008
 
9.
n. A young actor, usually in a musical, who is cast in a nonessential ensemble role but learns every other part in the show to replace and/or fill in for any other performer who is unable to perform during any particular performance.

v. (to pull a...) to fill in for a main role at a moment's notice despite not being the understudy/swing for it. This usually implies a success at playing said roll.

adj. used to describe a young, ambitious actor.
(Noun usage) "While his role had no lines and limited stage-time, the young Colby would be at every rehearsal so as to learn the show and see what parts he could fill in for."

(Verbal usage) "They asked the kid to play the part four minutes before curtain, and he played it perfectly!"

"That dude freakin' pulled a Colby!"

(Adjective Usage) "That kid keeps trying to steal my lines!"

"Yeah, he's such a Colby, he doesn't realize how rude that is..."
by Knavery September 02, 2008
 
10.
A sexy outdoors man who is strong and has a love for BACON he is also very cool
" that guy over is such a Colby
by The sexiest man alive117 February 11, 2014
 
11.
a very awesome, stylish, nerdy girl who lives in the midwest and has a voluptuous posterior.

derived from italian heritage. often mistaken for hispanic.

likes japanese culture, anime/manga, sweet lolita, harry potter, tattoos & piercings.
Girl : Who is that?

Boy : Oh, that's Colby.
by just-another-cheese November 28, 2009
 
12.
to punch someone in the nuts completely unexpectedly
Girl 1: Dude, she totally colbyed that guy!
Girl 2: but why?
Girl 1: i dont know, it was completely unexpected.

Guy 1: dude what happened?
Guy 2: idk she just colbyed me.
Guy 1: ouch bra
by KA1413 December 15, 2011
 
13.
verb

to colby is to stick something down your pants
person 1: ew, colby just colbied my highlighter and stuffed it in my face!!

person 2: thats disgusting, go throw it away!
by itarasayy May 16, 2011
 
14.
A popular, handsome "golden boy" who is secretly gay.
Evan is such a Colby. Ryan and him were totally eye-fucking each other at the party.
by Kool_Kate October 26, 2011