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Used to describe a guy who is cocky about his penis size.
Duder 1: "Dude my cack looks so big sometimes."

Duder 2: "I'm so happy for you... what the fuck am I supposed to say to that dude? You're so cacky sometimes."
cacky by westfalia January 22, 2010
1. Covered in cack
2. Rubbish
3. Excrement
1. It's all cacky now
2. That's really cacky
3. I did a cacky
Cacky by Hazza July 14, 2003
Alternate spelling of khaki, for the illiterate.
I had to wear cacky pants to the Chronic Misspelers' Convention.
Cacky by Doctor Robotto April 28, 2008
To be crazy fun, up for anything; spontaneously "hilaaaaarious."
"I dunno man, she just hopped in a car and drove off to Portland! Sparks and straws in-hand!!"
"Man, that's so cacky."
cacky by Smacky McSmopherson August 8, 2007
To be crazy fun, up for anything; spontaneously "hilaaaaarious."
"I dunno man, she just hopped in a car and drove off to Portland! Sparks and straws in-hand!!"
"Man, that's so cacky."
cacky by Smacky McSmopherson August 8, 2007

cacky bird legs 

A disease contracted in nightclubs in the 40s. Makes you walk like a pigeon with very flexible knees.
This poor woman contracted cacky bird legs while dancing in a night club in the 40s
cacky bird legs by Gemmarrrr March 30, 2008