I wouldn't use it to hit a dog on the ass
Used to describe something that has no value, doesn't taste good, doesn't look good, doesn't work and is inferior.
"Have you heard the new XYZ CD?" Matt asked Janine.
"Yup. Sucks. I wouldn't use it to hit a dog on the ass." Janine replied.
"Yup. Sucks. I wouldn't use it to hit a dog on the ass." Janine replied.