What is treacly?

Treacly is an adjective that describes something that is excessively sweet or sentimental. It is often used to describe language, music, or art that is overly emotional or maudlin. The term comes from the word "treacle," which originally referred to a sweet syrup made from the byproducts of sugar production. In modern usage, treacly can have a negative connotation, suggesting a lack of subtlety or sophistication in the subject matter.