食しょく指しが動うごく

expression, godan verb (-ku)

have an urge to do something; have a craving for; itch to do

Idiomatic expression literally meaning 'the index finger moves', used when one feels a strong desire or temptation to do something, especially to eat, buy, or start an activity. Often used with ～たい or ～たくなる.

• あのケーキを見みたら、食しょく指しが動うごいた。

  When I saw that cake, I got a craving for it.

• 新あたらしいゲーム機きに食しょく指しが動うごく。