Sticky gunk is a term used to describe a type of adhesive substance that is often difficult to remove. It can be found in many places, such as on the bottom of shoes or on furniture. The crossword solutions for sticky gunk are GOO (3 letters) and GOOP (4 letters). GOO is a slang term for a sticky, slimy substance, while GOOP is a brand name for a line of products that includes adhesives, cleaners, and lubricants.