The onomatopoeic sound of a cash till opening. Refers to the discovery of a sudden financial windfall, such as finding a dropped wallet full of cash, or the realisation that you are going to get most of your Tax back in a big ole wad.
Nikki: Ah, look, K.F.C.
man 2: i know i would never let my kids down near this part of town
man 1: what are we doing here?
man 2: im a sexual preditor
man 1: what do u mean?
man 2: did u not wonder why i was wearing a school uniform?
man 1: i thought it was a bit strange.
John: Holy shit!