What is another word for glopping up?
Pronunciation: [ɡlˈɒpɪŋ ˈʌp] (IPA) 
When it comes to describing something that has become sticky or clumpy, the phrase "glopping up" might immediately come to mind. However, there are plenty of other words and phrases that can convey a similar meaning. One option is "caking up," which implies a layer of solid material building up on a surface. Another possibility is "clotting," which suggests a thickening or coagulation process. "Gunking up" and "sludging up" can also be used to describe a substance that has become thick and sticky over time. Regardless of the specific choice of words, the common theme is an accumulation or buildup of material that causes a sticky or lumpy texture.
