"Goop" is a colloquial term that refers to a sticky or viscous substance. It can be used to describe things that are messy, gooey, or slimy. Full definition
I also keep a large batch of goop in the fridge so I don't have to take the time to mix it each time. (yupitsvegan.com)
He chose the pregelatinized rice favored by brewers: precooked to burst its starch cells and less likely to leave a mass of goop in the bottom of the vat. (discovermagazine.com)
So if you're in a healthy marriage and your anxiety was spiked upon hearing this news, or when you read the corresponding article on Goop by Dr. Habib Sadeghi & Dr. Sherry Sami — as were many of my clients and course members — remind yourself that their marriage isn't your marriage, and that you don't know what led to their decision to part ways. (mindbodygreen.com)