Green’s Dictionary of Slang

Kinder Eggs n.

(drugs) MDMA.

1997

S. Champion Disco Biscuits v: Doves, Playboys, Dollars, Apples, Swans, White Burgers, Brown Burgers [...] Dennis The Menaces, Rhubard and Custards, White Callies, Pink Flamingoes, Snowballs, Kinder Eggs, Energizers, Hammer & Sickles, Disco Biscuits.