Top Definition
Person who, while running or walking, falls forward, hitting their face and hands on the floor (usually pavement or concrete). The sharp sound produced by the person hitting the ground is "Klack!" Henceforth, they are a Klacker.

falling fall drop floor ground collapse collapsing tripping
My cousin was running laps in middle school when he fell and made "klack", so now I call him Klacker.

by Bithevoom April 25, 2008
1 more definition
a 20 - 30 something woman who always wears high heal shoes (usually Stilettos). Name for the sound they would make walking / running across a hardwood floor.
The Klackers in the office are getting together for happy hour tonight.
by BiCoastalBig D September 21, 2008

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