Clack is a slang term for bullshit which originated in south west london (Real Family)
1.Oi Fam Dun Gimme Da Clack!
2.Stop Clackin Before i Duppy you!
by Blaze(Real Family) July 11, 2009
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Fangirl abbreviation for the yaoi pairing Zack Fair and Cloud Strife from the video game Final Fantasy VII.
"Did you read that Clack fan-fic today? Zack and Cloud together are so cute."
by Ziggy Pasta November 28, 2009
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To hit someone, usually with the back of the hand.
I should clack you round the head for being such an idiot.
by B. Kizzle April 08, 2015
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An offensive racial slur that describes a person with both a Caucasian and a Black parent
I have a lot of friends who are clacks, so it's okay for me to say this - Barack Obama is the most successful clack of all time.
by nnam_ecnarret March 14, 2016
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(Noun)

Mix of the words "classic" and "black" Used to refer to a man or woman portraying stereotypical African American behavior.
Your friend:"Yo sup mah nigga u bring me da greens so we can roll one bigga than king kongs fingas"
You: "Bro, stop being such a clack.
by Ravedavey February 13, 2012
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Clack means to speak (about unimportant matters) rapidly and incessantly, originally from when Clacks' in England got their names for being royal court messengers. There is another version, of course, and that is it comes from the middle english work clakken, which comes from the Old Norse word Klaka which means thoughtless, prolonged talk...
What a clack of a sound, The horse made a clicky-clack noise as it rode past, A clack of thun
by Chris Clack November 23, 2006
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