v. to end interaction with someone who is not contributing to your well-being whatsoever; to be done with some one or something
E: D-Willi, what's going on with you and that chick?

D-Willi: I clacked her last night. Not worth my time.
by swifft January 25, 2008
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To be clacked.

Accosted heavily for errors in judgement, rationality, respect or placement of blame or otherwise.

That moment when someone says the wrong thing to the wrong person and in response (s)he proceeds to completely blow up their situation using perfectly arranged words, logic and rightious indignation to devastate the perpetrator upon being so erroneous or misplacing contempt or otherwise.
1. Hey what took you so long, dumbass?!

2. Oh, you mean how you were in my bathroom all night fucking my ex that you knew I was patching things up with and that I had told you in confidence was a little conflicted and that we were both having a moment of weakness? Well, to tell you the truth, I just fucked your girlfriend up stairs and then I called your boss and told them you've been scamming him out of money and then i called your mother and told her that YOU were actually the one who wrecked her car and now, RIGHT NOW, I'm holding the phone up with your side chick on the line who THINKS she is your one and only... DUMBASS.

3. Through the phone Wow, you just got clacked.
by GhostDino December 29, 2015
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A valve that allows a liquid to pass in one direction only. It has a flap or poppet device to prevent back-flow. They can be found on the old style windscreen washer where a plunger is pushed to operate it.

Another place to find one is on a boiler where the injectors force the water into it but the pressure must not be able to pass back along the supply pipe.
The water is mixed with the steam in the injector and passes through the supply pipe via the clack valve into the boiler.
by Le Macho August 30, 2007
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the act of terminating someone, usually with an STD of some sort.
Dude yesterday i clacked some guy for driving slow!
by DKproductionss February 7, 2010
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n. an abbreviation of the word 'cloaca', primarily to remove the long O.

In zoological anatomy, a cloaca is the pussy-asshole combo in certain animal species, such as birds. The word comes from Latin, and means sewer.
Lick my clack from front to back. Yeeeeah, taste it!
by pash_rash August 10, 2009
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