ker-ching
exclamation /kə ˈtʃɪŋ/
  /kər ˈtʃɪŋ/
(British English) (also ka-ching British and North American English)
 (North American English also cha-ching)
 (informal)- used to say that somebody is getting a lot of moneyWord OriginA way of representing the noise made by a cash register.