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An imitation of the sound made by a cash register, used when someone's action will result in mo' money; see also cha-ching
I'm gonna cash this check: ka-ching!
by dan September 28, 2004
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2
The sweet sound of cash. Usually associated with making (or spending) a windfall.

Etymology: from the sound an old-fashioned cash register makes when the cash drawer slides open.
by tomte May 19, 2004
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3
The sound a cash register makes. NY Times, 050904, in a review of Bob Woodward's book on the White House. "Plan of Attack".
"...to say nothing of the ka-ching of cash registers."
by John Heron May 09, 2004
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