All those in the US military receive a CAC card Common Access Card. This card is commonly refered to as one's Caack.

Bro Pilot: "Dude, you forgot your Cack again!"
Bro Pilot 2: "Yeah, I left it in the damned Cack hole"
by Peni S. Gigantor August 30, 2007
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A white person attempting to say the word cock.
Dude I saw this chack today and her tats were so fawking big dude it made my Cack get hard.
by Brendoballer February 29, 2008
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An adjective, verb, noun, whatever the hell you want it to be.
A) used when referring to someone's dick
B) when someone gets hit (anywhere, not just in the sack)
C) when something that sucks some serious ass happens to somebody
A) What a small cack Derek has!
B) Oh snap, that brick just cacked him in the face.
C) Your girlfreind cut off your dick? That's a cack and a half dude.
by The Jew on 102 December 7, 2005
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A sick ass word you use all the time to cancel out words like "Here", "Yes", "No" etc...
Example 1:

Teacher: Tyron Brown

Tyron: Cack!

Example 2:

Mother: Did you do your homework

Son: Cack!
by Blyatislav November 9, 2007
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Hey man that porno last night gave me a hard ass cack!
by B-rizzle988888888888 April 4, 2011
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yo bro, did you see that bit? she was sucking on my cack all night.

Those guys are so gay, they like cack in and around their buttholes.
by j-brohasaurous January 8, 2010
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