(N.) very great man who is extremly funny and has a huge penis. usually found mac'in on some babe. also known as k-slab.
"that guy over there is hogging all the babes!"
"yeah hes such a kelby"
by cory manshack February 14, 2008
verb. To eat an entree from a fast food restaurant immediately after eating an entire meal at another fast food restaurant.
Dude, we totally pounded a number three at Hardee's and then Kelbyed it with a corndog from Sonic.

McDonalds was awesome, but I could totally Kelby some Wendy's right now.
by Thunderpussy February 22, 2008
One who is 1337 and gets a lot of women to go to bed with him.
That dude at the bar was a total kelby!
by David Kalkanian December 15, 2007
Smart,thoughtful,fun to be around,
Cute, stays with one guy not a cheater,loves that one guy, has many friends, and beyond beautiful
Guy 1: who is that?
Guy 2: that's kelby

Guy 1: I want her
Guy 2: good luck dude she's taken
by Bella achenyumm June 17, 2013
A Kelby is equivalent to 500 Trevors (half a dick ton of thrust) in the listings of the SAE (standards of american engineering) ASM (American Sexual Mesurment) department.
He went a half a Kelby in that hoe
by MistaThummbThummb December 02, 2014
noun (kelb -ie)
-when you make a stupid mistake or stupid remark!
- usually stupid or blonde people make these comments
example 1
friend 1: oh i though you could get high of tinfoil
friend 2: um....NO stupid
friend 1: oh opps...
friend 2: wow...you just pulled a "kelby"
example 2
friend 1: hey i bet if you'll find the word gullible on this Doritos's bag
friend 2: okkie
friend 1: she suchs a "kelby"
by babyface:) November 20, 2011
snorlax looking creature who enjoys playing video games, listening to never shout never, drinking alcohol, and eating blue waffles. kelby's dialogue consists of the phrases "nope, you would, ohhhmyyygoddd, and of course...0k' "
(how a convo would go if a girl was asking out the kelby creature):

girl: "hey kelby, i need to talk to u about something"
kelby: "ohhhhmyyyygodddd"
girl: "so...i was wondering if u wanted to go out with me?"
kelby: -shakes head repeatedly- and says "nope nope nope"
girl: cries
kelby: "you wouuld"
by naynay8 April 29, 2010

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