I've got the munchies.
An attack of the munchies.
Golden plovers seem to get the night-time munchies - under the cover of darkness, they eat 70 per cent more worms per minute!
Many also have the munchies, an intense craving for food.
I'm off for some mid-afternoon munchies of my own.
It couldn't possibly be that you had a now-forgotten attack of the late-night munchies, could it now?