Esnacking is when you're hungry for a specific snack that you don't have and go online and search fot it and eventually buy it, even though it won't arrive for a week.
Variant on the common term ‘cradle snatching’ for someone who is sweet on a much younger honey. If you are not in it for the long haul but simply want to sample the youth for a short while, you are ‘cradle snacking’.