Top Definition
the Irish for Shit. also, a person's cac's is their trousers or underwear in ireland.
that film was cac.
or, "Sean will u pull up your cacs, and put your mickey away u horny fecker"
by Emzolita March 31, 2007

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Means shit
Cac your pants
by paul-k January 22, 2004

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The Common Access Card (CAC) is a United States Department of Defense smartcard issued as standard identification for active duty military personnel, selected reserve personnel, civilian employees, and eligible contractor personnel.

The CAC is used as a general identification card as well as for authentication to enable access to DoD computers, networks, and certain DoD facilities. It also serves as an identification card under the Geneva Conventions. The CAC enables encrypting and crytographically signing email, facilitating the use of PKI authentication tools, and establishes an authoritative process for the use of identity credentials.
Sir, you need to show your CAC to gain entry to the base.
by Severian919 January 24, 2007

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Another way to say "cock."
Shaddup, ya fuckin cac!
by poop February 12, 2003

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Slang: Alternative for pussy or vagina, A cowardly person.

Origin: Alaska 21st century.
Stop being such a cac and do it already!

All we need is some beer and this place will be crawling with cac.

You shut up! Maybe if you weren't acting like a stupid cac.
by Robert M. Brooks Jr. January 17, 2008

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Another spelling of cack or cak, meaning shit or something inferior..
'That new Good Charlotte song is cac!'
by Evil-Ernie May 29, 2003

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Carry-Able-Computer - A way more awesome definition for laptop.
Are you looking at Poképorn on your CAC? That's nasty.
by TheGreatKhali April 04, 2011

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