Kack 

The pinnacle of all that is awesome.

Not to be mistaken for the German verb "kacken," which means "to defecate."

Megan: "Man, Jack Black is amazingly kack!"

Sam: "Dude, I gotta take a massive kack."
Sally: "No, dumbass, that's not how you use the word!"

Kack by blackbayou August 29, 2007

Kack 

To bail out or to tell someone that you were going to do something and you don't show.

She said she could do something but the stupid fool kacked-out!

Kack by Corissa August 10, 2004

Kack 

it is exactly like the word pack, back and a lot of other words that ryhme with kack but it starts with a k instead of all the other letters

i was writing an essay when i said pack instead of kack

Kack by Poopy Pooperson May 2, 2005

kack 

An injury on the shin typically recieved during mountain bike trials. Caused by the pedals ripping flesh from the rider.

Dude! Check out this gnarly kack I got riding yesterday!

kack by txfreerider January 6, 2007

kack 

to be de-pledged from a fraternity or sorority

He was kacked because he sucked as a pledge

kack by P-diddy April 3, 2004

kack 

Slang word for horsepoop/horsenuck

Don't eat KACK!-Good sentence for kack
You are a kack!-Slang sentence for kack

kack by KiraKosarinHater June 20, 2018

kack 

to sleep

“i’m so tired i’m about to kack out”

kack by yesssinndeeed August 13, 2018