Shivery Yells

We're on sidewalks, we're on porches,
Dressed in costumes to scare.
Through the city we're ringing the doorbells.
Trick or treating, candy eating,
Gooey stuff in our hair,
But the most fun is shrieking out loud,
"Shivery yells! Shivery yells!"
That's the Halloween nitty-gritty.
"Moan and Groan. Leave us alone.
Halloween's just one night a year."