expression, godan verb (-ku)
get a little hungry; feel peckish
Describes a mild hunger, not a full meal craving. Often used when it's not yet mealtime but you want a small snack.
午後3時になると、いつも小腹が空く。
I always get a little hungry around 3 p.m.
小腹が空いたから、おにぎりを食べよう。
I'm feeling peckish, so let's have a rice ball.