kit-kat shuffle, n. — Green’s Dictionary of Slang

kit-kat shuffle n.

[a two-fingered version of the five-finger shuffle under five-finger(ed) adj.; the chocolate bar Kit-Kat, which comes in two or four fingers; but note kitty n.² (1)]

female masturbation.

2002		BigBro3.com 🌐 I used to sit up all night watching E4 in the hope of catching Elizabeth having a quick kit-kat shuffle.
2002		Fat Dancer 🌐 Euphemisms for Girls Top 3: 3) Playing tiddlywinks. 2) The Kit Kat shuffle. 1) Chasing the bean round the plate.