Wiktionary
raspberry ripple
n. A variety of vanilla ice cream containing streaks of raspberry-flavoured syrup.
Wikipedia
Raspberry Ripple
Raspberry Ripple is a popular flavour of ice cream in Great Britain and elsewhere. It consists of raspberry syrup injected into vanilla ice cream. The term "ripple" in ice cream manufacture and consumption is thought to have originated in the United States where it was used to denote any type of ice cream ribboned through with coloured and flavoured syrup. Raspberry ripple has been a popular variant ever since.