Imitative of the sound made by an old-fashioned cash register when an amount is rung up.
- (onomatopoeia, informal, humorous) Said to indicate that someone is obtaining money, especially a comparatively large amount.
- 2010 - I asked a smiling lawyer what she thought of this policy. She replied, 'I have one word to say on the prospect of taking MPs to court: "Kerching!"' - Mark Thomas, The People's Manifesto