The term 'Filler of Holes' can be defined as someone who uses spackle, which is a type of material used to fill in small holes and cracks in walls and other surfaces. Spackle is typically made from gypsum dust mixed with glue, and it is applied with a putty knife. Once it dries, it can be sanded down and painted over. This job is often done by professional painters or handymen, but it can also be done by homeowners who want to do some DIY repairs.