Flat as a Pancake
If you’ve ever eaten a pancake you’ll know how flat it is.
When something is as flat as a pancake, it’s completely level or flat.
“Why!” exclaimed Ruchika in disappointment, “There’s not a hill in sight here. The landscape is as flat as a pancake.”
“Please try to sing in tune,” said the music teacher as patiently as she could. “Last time that particular note was as flat as a pancake.”