Goop (noun)

1. A sticky, slimy, or gooey substance.
2. Something that is thick, wet, and messy.

Origin:

Early 20th century: of uncertain origin.

Examples:

1. The dough was so sticky it felt like goop.
2. The engine was covered in oil and goop.
3. The mud was so thick it felt like goop.
4. The paint was goop, it took forever to dry.
5. The goop was hard to clean off the floor.